chore(deps): bump codecov/codecov-action from 3.1.4 to 3.1.5 (ietf-tools#6992)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.1.4...v3.1.5)

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

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -59,7 +59,7 @@ jobs:
         path: geckodriver.log
 
     - name: Upload Coverage Results to Codecov
-      uses: codecov/codecov-action@v3.1.4
+      uses: codecov/codecov-action@v3.1.5
       with:
         files: coverage.xml