chore(ci): upgrade webfactory/ssh-agent from v0.9.0 to v0.10.0

v0.10.0 upgrades from Node.js 20 to Node.js 24, resolving the
deprecation warning ahead of the June 2026 forced migration.

.github/workflows/git-sync.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: SSH Agent
-        uses: webfactory/ssh-agent@v0.9.0
+        uses: webfactory/ssh-agent@v0.10.0
         with:
           ssh-private-key: ${{ secrets.BITBUCKET_SECRET }}