Bump simplecov-html from 0.12.2 to 0.12.3 (#14883)

Bumps [simplecov-html](https://github.com/simplecov-ruby/simplecov-html) from 0.12.2 to 0.12.3.
- [Release notes](https://github.com/simplecov-ruby/simplecov-html/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov-html/blob/main/CHANGELOG.md)
- [Commits](https://github.com/simplecov-ruby/simplecov-html/compare/v0.12.2...v0.12.3)

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

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

Gemfile.lock

@@ -587,7 +587,7 @@ GEM
     simplecov (0.19.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
-    simplecov-html (0.12.2)
+    simplecov-html (0.12.3)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)