chore(deps): update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/dotnet.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0 # avoid shallow clone