Add links to Matrix and IRC chat when opening new issues (#5764)

Author: TobiGr

.github/ISSUE_TEMPLATE/config.yml

@@ -1 +1,8 @@
 blank_issues_enabled: false
+contact_links:
+  - name: 💬 IRC
+    url: https://webchat.freenode.net/#newpipe
+    about: Chat with us via IRC for quick Q/A
+  - name: 💬 Matrix
+    url: https://matrix.to/#/#freenode_#newpipe:matrix.org
+    about: Chat with us via Matrix for quick Q/A