CI/whitespace-check: add timeout-minutes

Author: dannywillems

.github/workflows/whitespace-check.yaml

@@ -8,10 +8,11 @@ on:
 
 jobs:
   check-whitespace:
+    timeout-minutes: 1
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v5
 
       - name: Check for trailing whitespaces
-        run: make check-trailing-whitespace
+        run: make check-trailing-whitespace