slack-config/sig-release: Add #release-team-leads channel (#6324)

* Add #release-leads Slack channel

* Don't reference a channel before it's created

* Update channel name

Co-authored-by: Stephen Augustus (he/him) <[email protected]>

Co-authored-by: Stephen Augustus (he/him) <[email protected]>

Author: JamesLaverack

communication/slack-config/sig-release/config.yaml

@@ -8,3 +8,4 @@ channels:
   - name: release-management
     id: CJH2GBF7Y
   - name: release-notes
+  - name: release-team-leads