chore(deps): update actions/checkout action to v7

Author: lucca-renovate[bot]

.github/workflows/dotnetcore.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     - run: git fetch --prune --unshallow
 
     - name: Setup .NET Core 8