Update codecov/codecov-action digest to ad3126e

Author: renovate[bot]

.github/workflows/main.yml

@@ -158,7 +158,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: always()
-        uses: codecov/codecov-action@e28ff129e5465c2c0dcc6f003fc735cb6ae0c673
+        uses: codecov/codecov-action@ad3126e916f78f00edff4ed0317cf185271ccc2d
         with:
           token: ${{ secrets.CODECOV_TOKEN }}