Make Primer / Main concurrent (#6774)

Author: DanielNoord

.github/workflows/primer_run_main.yaml

@@ -10,6 +10,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   CACHE_VERSION: 1