Bump simplecov-html from 0.12.3 to 0.13.1

Bumps [simplecov-html](https://github.com/simplecov-ruby/simplecov-html) from 0.12.3 to 0.13.1.
- [Release notes](https://github.com/simplecov-ruby/simplecov-html/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov-html/blob/main/CHANGELOG.md)
- [Commits](simplecov-ruby/simplecov-html@v0.12.3...v0.13.1)

---
updated-dependencies:
- dependency-name: simplecov-html
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -84,7 +84,7 @@ GEM
     simplecov-cobertura (2.1.0)
       rexml
       simplecov (~> 0.19)
-    simplecov-html (0.12.3)
+    simplecov-html (0.13.1)
     simplecov_json_formatter (0.1.4)
     unicode-display_width (2.6.0)
     yard (0.9.37)