Harden PowerShell CI execution limits

Author: Lay007

.github/workflows/pwsh-ci.yml

@@ -10,10 +10,15 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: powershell-ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   analyze:
     name: Analyze PowerShell scripts
     runs-on: ubuntu-latest
+    timeout-minutes: 15
 
     steps:
       - name: Checkout