Added financial contributors to the README (ChilliCream#1699)

Co-authored-by: Michael Staib <michael@chillicream.com>

README.md

@@ -1,6 +1,6 @@
 ![HotChocolate](https://chillicream.com/img/projects/hotchocolate-banner.svg)
 
-[![GitHub release](https://img.shields.io/github/release/chillicream/HotChocolate.svg)](https://github.com/ChilliCream/hotchocolate/releases) [![NuGet Package](https://img.shields.io/nuget/v/hotchocolate.svg)](https://www.nuget.org/packages/HotChocolate/) [![License](https://img.shields.io/github/license/ChilliCream/hotchocolate.svg)](https://github.com/ChilliCream/hotchocolate/releases) [![Azure DevOps builds](https://img.shields.io/azure-devops/build/chillicream/414ff59c-4852-4687-b04d-6973125e7de2/48.svg)](https://chillicream.visualstudio.com/HotChocolate/_build?definitionId=48) [![Azure DevOps tests](https://img.shields.io/azure-devops/tests/chillicream/HotChocolate/48.svg)](https://chillicream.visualstudio.com/HotChocolate/_build?definitionId=48) [![Coverage Status](https://sonarcloud.io/api/project_badges/measure?project=HotChocolate&metric=coverage)](https://sonarcloud.io/dashboard?id=HotChocolate) [![Quality](https://sonarcloud.io/api/project_badges/measure?project=HotChocolate&metric=alert_status)](https://sonarcloud.io/dashboard?id=HotChocolate)
+[![Financial Contributors on Open Collective](https://opencollective.com/chillicream/all/badge.svg?label=financial+contributors)](https://opencollective.com/chillicream) [![GitHub release](https://img.shields.io/github/release/chillicream/HotChocolate.svg)](https://github.com/ChilliCream/hotchocolate/releases) [![NuGet Package](https://img.shields.io/nuget/v/hotchocolate.svg)](https://www.nuget.org/packages/HotChocolate/) [![License](https://img.shields.io/github/license/ChilliCream/hotchocolate.svg)](https://github.com/ChilliCream/hotchocolate/releases) [![Azure DevOps builds](https://img.shields.io/azure-devops/build/chillicream/414ff59c-4852-4687-b04d-6973125e7de2/48.svg)](https://chillicream.visualstudio.com/HotChocolate/_build?definitionId=48) [![Azure DevOps tests](https://img.shields.io/azure-devops/tests/chillicream/HotChocolate/48.svg)](https://chillicream.visualstudio.com/HotChocolate/_build?definitionId=48) [![Coverage Status](https://sonarcloud.io/api/project_badges/measure?project=HotChocolate&metric=coverage)](https://sonarcloud.io/dashboard?id=HotChocolate) [![Quality](https://sonarcloud.io/api/project_badges/measure?project=HotChocolate&metric=alert_status)](https://sonarcloud.io/dashboard?id=HotChocolate)
 [![Slack channel](https://img.shields.io/badge/join%20the%20community-on%20slack-blue.svg)](https://join.slack.com/t/hotchocolategraphql/shared_invite/enQtNTA4NjA0ODYwOTQ0LTViMzA2MTM4OWYwYjIxYzViYmM0YmZhYjdiNzBjOTg2ZmU1YmMwNDZiYjUyZWZlMzNiMTk1OWUxNWZhMzQwY2Q) [![Twitter](https://img.shields.io/badge/join%20us-on%20twitter-green.svg)](https://twitter.com/chilli_cream)
 
 ---
@@ -213,3 +213,33 @@ We have moved the roadmap into the [ROADMAP.md](ROADMAP.md)
 For more examples and detailed documentation, click [here](http://hotchocolate.io).
 
 For documentation about our _DataLoader_ implementation click [here](https://github.com/ChilliCream/hotchocolate/tree/master/src/DataLoader).
+
+## Contributors
+
+### Code Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="https://github.com/ChilliCream/hotchocolate/graphs/contributors"><img src="https://opencollective.com/chillicream/contributors.svg?width=890&button=false" /></a>
+
+### Financial Contributors
+
+Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/chillicream/contribute)]
+
+#### Individuals
+
+<a href="https://opencollective.com/chillicream"><img src="https://opencollective.com/chillicream/individuals.svg?width=890"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/chillicream/contribute)]
+
+<a href="https://opencollective.com/chillicream/organization/0/website"><img src="https://opencollective.com/chillicream/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/1/website"><img src="https://opencollective.com/chillicream/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/2/website"><img src="https://opencollective.com/chillicream/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/3/website"><img src="https://opencollective.com/chillicream/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/4/website"><img src="https://opencollective.com/chillicream/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/5/website"><img src="https://opencollective.com/chillicream/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/6/website"><img src="https://opencollective.com/chillicream/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/7/website"><img src="https://opencollective.com/chillicream/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/8/website"><img src="https://opencollective.com/chillicream/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/chillicream/organization/9/website"><img src="https://opencollective.com/chillicream/organization/9/avatar.svg"></a>