chore(deps): pin codecov/codecov-action action to d9f34f8 (#52)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
         run: dotnet test --no-build
 
       - name: Codecov
-        uses: codecov/codecov-action@v3.1.1
+        uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70 # v3.1.1
         with:
           files: '**/TestResults/*/*.cobertura.xml'