fix: specify repo for gh workflow run command

The gh CLI defaults to upstream repo in forks, explicitly specify
${{ github.repository }} to run workflow on current fork.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: zcg

.github/workflows/sync-upstream.yml

@@ -89,4 +89,4 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          gh workflow run 88code-release.yml
+          gh workflow run 88code-release.yml --repo ${{ github.repository }}