Fix workflow permissions for publishing image

Signed-off-by: Juan Antonio Osorio <ozz@stacklok.com>

Author: JAORMX

.github/workflows/run-on-main.yml

@@ -16,5 +16,9 @@ jobs:
   image-build-and-push:
     name: Build and Sign Image
     needs: [ linting, tests ]
+    permissions:
+      contents: write
+      packages: write
+      id-token: write
     uses: ./.github/workflows/image-build-and-publish.yml