chore(ci): do not run the docker-example when not needed

If the organization is for release, integration or experimental, no
need to run the docker example test.

.forgejo/workflows/example-docker-compose.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   example-docker-compose:
+    if: github.repository_owner != 'forgejo-integration' && github.repository_owner != 'forgejo-experimental' && github.repository_owner != 'forgejo-release'
     runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4