Update codecov to v2

Signed-off-by: Ev Lacey <elacey@nvidia.com>

Author: evberrypi

.github/workflows/pr.yml

@@ -37,7 +37,7 @@ jobs:
           source .venv/bin/activate
           coverage xml
       - name: Upload coverage
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2
         with:
           fail_ci_if_error: false
-          file: ./coverage.xml
+          files: ./coverage.xml