ci: add release-please concurrency settings (#793)

Signed-off-by: Joseph Livesey <[email protected]>

Author: suchapalaver

.github/workflows/containers.yml

@@ -13,6 +13,10 @@ env:
 
 jobs:
   release-please:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    concurrency:
+      group: release-please-${{ github.ref }}
+      cancel-in-progress: true
     permissions:
       contents: write
       pull-requests: write
@@ -31,6 +35,7 @@ jobs:
   builds-linux:
     runs-on: ubuntu-latest
     needs: release-please
+    if: always() && (needs.release-please.result == 'success' || needs.release-please.result == 'skipped')
     strategy:
       matrix:
         target: [indexer-service-rs, indexer-tap-agent]