Update verify-lxd-vm.yml

Author: pwong2021

.github/workflows/verify-lxd-vm.yml

@@ -6,10 +6,17 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   validate:
     name: Validate my profile
     runs-on: ubuntu-latest
+    timeout-minutes: 120
+    permissions:
+      contents: read
     env:
       CHEF_LICENSE: accept-silent
       CHEF_LICENSE_KEY: ${{ secrets.SAF_CHEF_LICENSE_KEY }}