Autopush: only execute if in inducer repo

.github/workflows/autopush.yml

@@ -7,6 +7,7 @@ on:
 jobs:
     autopush:
         name: Automatic push to gitlab.tiker.net
+        if: startsWith(github.repository, 'inducer/')
         runs-on: ubuntu-latest
         steps:
         -   uses: actions/checkout@v4