Add link to GHA discussions

Co-authored-by: Sviatoslav Sydorenko <[email protected]>

Author: abhinavsingh

setup.cfg

@@ -10,6 +10,7 @@ project_urls =
   Docs: Changelog = https://proxypy.rtfd.io/en/latest/#changelog
   Docs: RTD = https://proxypy.rtfd.io/en/latest/
   Docs: Intro = https://abhinavsingh.com/proxy-py-a-lightweight-single-file-http-proxy-server-in-python/
+  GitHub: discussions = https://github.com/abhinavsingh/proxy.py/discussions
   GitHub: issues = https://github.com/abhinavsingh/proxy.py/issues
   GitHub: repo = https://github.com/abhinavsingh/proxy.py
 download_url = https://github.com/abhinavsingh/proxy.py/archive/master.zip