use gh action checkout v5

Author: sebsto

.github/workflows/pull_request.yml

@@ -46,7 +46,7 @@ jobs:
     timeout-minutes: 1
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           persist-credentials: false
       - name: Check for Semantic Version label