Update checkout

Signed-off-by: Henrique Graca <[email protected]>

Author: hjgraca

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332  # v4.1.7
       - name: Setup .NET 6.0 &  8.0
         uses: actions/setup-dotnet@4d6c8fcf3c8f7a60068d26b594648e99df24cee3 # 4.0.0
         with: