chore: add concurrency to GH Actions

Author: SimenB

.github/workflows/nodejs.yml

@@ -10,6 +10,10 @@ on:
       - main
       - next
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   prepare-yarn-cache-ubuntu:
     uses: ./.github/workflows/prepare-cache.yml