ci: add mirrorc placeholder

Author: MistEO

.github/workflows/install.yml

@@ -183,6 +183,7 @@ jobs:
         # https://mirrorchyan.com/
       - name: Trigger MirrorChyanUploading
         if: false
+        # if: ${{ github.repository_owner == 'MaaXYZ' }}
         shell: bash
         run: |
           gh workflow run --repo $GITHUB_REPOSITORY mirrorchyan_release.yml -f tag=${{ needs.meta.outputs.tag }}