Revert "update README.md"

This reverts commit 72983f8adc.

README.md

@@ -1,7 +1,7 @@
-# Gidbig
+# Gidbig
 
-Gidbig is a Discord Bot in Go based on (now deprecated)
-[Airhorn Bot by Hammer and Chisel](https://github.com/discord/airhornbot/tree/golang).  
+Gidbig is a Discord Bot in Go based on
+[Airhorn Bot by Hammer and Chisel](https://github.com/hammerandchisel/airhornbot/).  
 Visit [https://airhorn.solutions/](https://airhorn.solutions/).
 
 ## Features
@@ -16,7 +16,10 @@ Typing only the `!command` without an argument results in a random sound of this
 
 ## Installation
 Coming soon.
-
 ## To do
 - more web interface enhancements
-- add support for more than just `.dca` files, mp3 would be nice!
+
+## Known issues
+- `https://discordapp.com/api/oauth2` needs to be added to `brokenAuthHeaderProviders` in `golang.org/x/oauth2/internal/token.go` in order for oauth2 to work again.
+
+Please use the issue tracker.