Update conf.py

Author: DineshNehra29

docs/source/conf.py

@@ -150,6 +150,11 @@
             # The type of image to be used (see below for details)
             "type": "fontawesome",
         },
+        {
+            "name": "Discord",
+            "url": "https://discord.com/invite/4TAGhqJ7s5",
+            "icon": "fa-brands fa-discord",
+        },
         {
             "name": "PyPI",
             "url": "https://pypi.org/project/pyopenms",