ci: fix build context

Author: stdavis

.github/actions/deploy-cloudrun/action.yml

@@ -66,7 +66,7 @@ runs:
       with:
         builder: ${{ steps.builder.outputs.name }}
         tags: ${{ steps.meta.outputs.tags }}
-        context: ./jobs
+        context: '{{defaultContext}}:jobs'
         file: ./Dockerfile
         push: true
         cache-from: type=gha