[misc] Improve Issue/PR templates (#11499)

Authored by: seproDev

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,5 @@
 blank_issues_enabled: false
 contact_links:
-  - name: Get help from the community on Discord
+  - name: Get help on Discord
     url: https://discord.gg/H5MNcFW63r
-    about: Join the yt-dlp Discord for community-powered support!
-  - name: Matrix Bridge to the Discord server
-    url: https://matrix.to/#/#yt-dlp:matrix.org
-    about: For those who do not want to use Discord
+    about: Join the yt-dlp Discord server for support and discussion