Update README.md

Author: jurruh

README.md

@@ -1,7 +1,7 @@
 # :whale2: Docker HTTP container upgrade
 Pull a new docker image and restart a running container with just a simple HTTP call.
 
-## :wrench: Usage
+## :rocket: Usage
 At first we need to start the web server this can be done with a docker container:
 ```bash
 docker run -v /var/run/docker.sock:/var/run/docker.sock -p 3000:3000 jurruh/http-container-upgrade
@@ -11,5 +11,5 @@ If the web server is started we can perform a GET request with the container nam
 curl localhost:3000/:containername
 ```
 
-## :notebook: Notes
+## :memo: Notes
 Currently this is a hobby project the code does not have any tests and the HTTP requests do not require authorization. I do not recommend to use this project in a production system. But feel free to build on top of this repo or use it as inspiration.