Added source code to config.yml

Author: LooFifteen

src/main/resources/config.yml

@@ -23,6 +23,7 @@
 #   Helpful Links:
 #    Support          |   https://discord.hypera.dev
 #    Documentation    |   https://docs.hypera.dev/docs/ultrastaffchat-bungeecord
+#    Source Code      |   https://github.com/HyperaOfficial/UltraStaffChat