feat: add concurrency settings to validate-and-release.yml (#98)

Author: robinmordasiewicz

.github/workflows/validate-and-release.yml

@@ -25,6 +25,10 @@ on:
 env:
   PYTHON_VERSION: '3.11'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   validate:
     name: Validate Specs
@@ -457,4 +461,4 @@ jobs:
           git push origin "$BRANCH"
           gh pr create --title "docs: update validation report" \
             --body "Auto-generated from validation pipeline run."
-          gh pr merge --auto --squash
+          gh pr merge --auto --squash