ci: enable cancel-in-progress on concurrent run on release-plz

Author: davidB

.github/workflows/release-plz.yml

@@ -10,6 +10,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
 jobs:
   release-plz:
     name: Release-plz
@@ -25,4 +29,4 @@ jobs:
         uses: MarcoIeni/release-plz-action@v0.5
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}