doc: Use LinkedIn badge instead of Twitter

I no longer use Twitter, so I'd prefer to direct traffic to LinkedIn where I am more active.

README.md

@@ -10,7 +10,7 @@
 [![](https://badgen.net/docker/pulls/thehale/python-poetry)](https://hub.docker.com/r/thehale/python-poetry)
 [![](https://badgen.net/github/license/thehale/docker-python-poetry)](https://github.com/thehale/docker-python-poetry/blob/master/LICENSE)
 [![](https://badgen.net/badge/icon/Sponsor/pink?icon=github&label)](https://github.com/sponsors/thehale)
-[![](https://badgen.net/badge/icon/Follow%20@jhaledev/1DA1F2?icon=twitter&label)](https://twitter.com/intent/user?screen_name=jhaledev)
+[![](https://img.shields.io/badge/LinkedIn-thehale-0A66C2?logo=linkedin)](https://linkedin.com/in/thehale)
 
 Robust, lightweight, configurable `python-poetry` Docker images for any use
 case.