Bump coverallsapp/github-action from 2.3.0 to 2.3.6

Bumps [coverallsapp/github-action](https://github.com/coverallsapp/github-action) from 2.3.0 to 2.3.6.
- [Release notes](https://github.com/coverallsapp/github-action/releases)
- [Commits](coverallsapp/github-action@v2.3.0...v2.3.6)

---
updated-dependencies:
- dependency-name: coverallsapp/github-action
  dependency-version: 2.3.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           make coveralls
 
       - name: Coveralls
-        uses: coverallsapp/github-action@v2.3.0
+        uses: coverallsapp/github-action@v2.3.6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           fail-on-error: false