ci: update codecov (#1405)

Author: aaron-steinfeld

.github/workflows/build-and-test.yml

@@ -119,7 +119,7 @@ jobs:
           CHUNKS: ${{ needs['setup-test-batches'].outputs['test-chunks'] }}
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2
         with:
           fail_ci_if_error: true