build(deps): bump coverallsapp/github-action from 2.3.4 to 2.3.6

Bumps [coverallsapp/github-action](https://github.com/coverallsapp/github-action) from 2.3.4 to 2.3.6.
- [Release notes](https://github.com/coverallsapp/github-action/releases)
- [Commits](coverallsapp/github-action@cfd0633...648a8eb)

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

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

.github/workflows/main.yml

@@ -60,7 +60,7 @@ jobs:
       - run: just coverage
       - uses: ./.github/actions/cache_save
 
-      - uses: coverallsapp/github-action@cfd0633edbd2411b532b808ba7a8b5e04f76d2c8
+      - uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b
         with:
           format: lcov
           file: target/coverage/coverage.lcov