fix: pin ccov

Author: sakulstra

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
           'src/contracts/dependencies/*'
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@ea99328d1c4d5f39fda7cbffe104afd6906c50b0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: ${{ github.repository }}