Build(deps): Bump css_parser from 1.14.0 to 1.15.0 (#23323)

Bumps [css_parser](https://github.com/premailer/css_parser) from 1.14.0 to 1.15.0.
- [Changelog](https://github.com/premailer/css_parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/premailer/css_parser/compare/v1.14.0...v1.15.0)

---
updated-dependencies:
- dependency-name: css_parser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -120,7 +120,7 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    css_parser (1.14.0)
+    css_parser (1.15.0)
       addressable
     dartsass-ruby (3.0.1)
       sass-embedded (~> 1.54)