docs: Added notes about sponsors (#268)

Author: antonbabenko

README.md

@@ -4,6 +4,22 @@
 
 Want to contribute? Check [open issues](https://github.com/antonbabenko/pre-commit-terraform/issues?q=label%3A%22good+first+issue%22+is%3Aopen+sort%3Aupdated-desc) and [contributing notes](/.github/CONTRIBUTING.md).
 
+## Sponsors
+
+<br />
+<a href="https://www.env0.com/?utm_campaign=pre-commit-terraform&utm_source=sponsorship&utm_medium=social"><img src="https://raw.githubusercontent.com/antonbabenko/pre-commit-terraform/master/assets/env0.png" alt="env0" width="180" height="44" />
+
+Automated provisioning of Terraform workflows and Infrastructure as Code.</a>
+
+<br />
+<a href="https://www.infracost.io/?utm_campaign=pre-commit-terraform&utm_source=sponsorship&utm_medium=social"><img src="https://raw.githubusercontent.com/antonbabenko/pre-commit-terraform/master/assets/infracost.png" alt="infracost" width="200" height="38" />
+
+Cloud cost estimates for Terraform.</a>
+
+If you are using `pre-commit-terraform` already or want to support its development and [many other open-source projects](https://github.com/antonbabenko/terraform-aws-devops), please become a [GitHub Sponsor](https://github.com/sponsors/antonbabenko)!
+
+## Table of content
+
 * [How to install](#how-to-install)
   * [1. Install dependencies](#1-install-dependencies)
   * [2. Install the pre-commit hook globally](#2-install-the-pre-commit-hook-globally)