Build(deps): Bump css_parser from 1.11.0 to 1.12.0 (#18273)

Bumps [css_parser](https://github.com/premailer/css_parser) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/premailer/css_parser/releases)
- [Changelog](https://github.com/premailer/css_parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/premailer/css_parser/compare/v1.11.0...v1.12.0)

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

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

Gemfile.lock

@@ -111,7 +111,7 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    css_parser (1.11.0)
+    css_parser (1.12.0)
       addressable
     debug_inspector (1.1.0)
     diff-lcs (1.5.0)