chore: add latest tag

Author: skjnldsv

.github/workflows/docker-publish.yml

@@ -77,7 +77,7 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
+          tags: ${{ steps.meta.outputs.tags }},skjnldsv/docker-nextcloud-dev:latest
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max