Update repo owner in sync-ruby

Author: paracycle

.github/workflows/sync-ruby.yml

@@ -6,7 +6,7 @@ jobs:
   sync:
     name: Sync ruby
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'rubygems' }}
+    if: ${{ github.repository_owner == 'ruby' }}
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with: