Build(deps): Bump css_parser from 1.8.0 to 1.9.0 (#11983)

Bumps [css_parser](https://github.com/premailer/css_parser) from 1.8.0 to 1.9.0.
- [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/v1.8.0...v1.9.0)

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

Gemfile.lock

@@ -93,7 +93,7 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    css_parser (1.8.0)
+    css_parser (1.9.0)
       addressable
     debug_inspector (1.0.0)
     diff-lcs (1.4.4)