Bump actions/upload-artifact from v2.0.1 to 2.1.0 (#37841)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from v2.0.1 to 2.1.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v2.0.1...ebad382c0953e8c6b4039e8d30dfd19ee7b2a862)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yaml

@@ -733,7 +733,7 @@ jobs:
             -p no:sugar \
             tests
       - name: Upload coverage artifact
-        uses: actions/upload-artifact@v2.0.1
+        uses: actions/upload-artifact@2.1.0
         with:
           name: coverage-${{ matrix.python-version }}-group${{ matrix.group }}
           path: .coverage