ci: bump github action versions

Author: Chris53897

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     name: Check composer.json
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: shivammathur/setup-php@v2
         with:
           coverage: none
@@ -25,7 +25,7 @@ jobs:
       name: Static analysis
       runs-on: ubuntu-latest
       steps:
-          - uses: actions/checkout@v3
+          - uses: actions/checkout@v4
           - uses: shivammathur/setup-php@v2
             with:
                 coverage: none