chore: enable sync-labels for issue and PR labeler

- turn on sync-labels in github/issue-labeler action
- automatically remove labels when regex no longer matches
- keeps issue and PR type labels current after edits

Author: dgibbs64

.github/workflows/labeler.yml

@@ -30,6 +30,7 @@ jobs:
           configuration-path: .github/labeler.yml
           enable-versioned-regex: 0
           include-title: 1
+          sync-labels: 1
 
   is-sponsor-label:
     if: github.repository_owner == 'GameServerManagers' && github.event_name == 'issues'