Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/sonarcloud.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 

.github/workflows/unittests.yml

@@ -15,7 +15,7 @@ jobs:
         os: ['ubuntu-latest']
         php: [8.3]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2