Bump codecov/codecov-action from 2.1.0 to 3.1.1 (#1399)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.1.0 to 3.1.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v2.1.0...v3.1.1)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

.github/workflows/python-package.yml

@@ -71,7 +71,7 @@ jobs:
 # \todo Should the Codecov web pages show the results of the C++ or Python tests?
 #    - name: Upload coverage to Codecov
 #      if: matrix.os == env.GH_COV_OS && github.actor != env.GH_DEPENDABOT
-#      uses: codecov/codecov-action@v2.1.0
+#      uses: codecov/codecov-action@v3.1.1
 #      with:
 #        files: ${{ env.OTIO_BUILD_DIR }}/coverage.filtered.info
 #        flags: unittests
@@ -147,7 +147,7 @@ jobs:
       run: make lcov
     - name: Upload coverage to Codecov
       if: matrix.python-version == env.GH_COV_PY && matrix.os == env.GH_COV_OS && github.actor != env.GH_DEPENDABOT
-      uses: codecov/codecov-action@v2.1.0
+      uses: codecov/codecov-action@v3.1.1
       with:
         flags: py-unittests
         name: py-opentimelineio-codecov