chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/core-cicd.yaml

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: '8.0.x'