Build(deps): Bump codemirror-graphql from 0.12.2 to 0.12.3 in /website (#9462)
Bumps [codemirror-graphql](https://github.com/graphql/graphiql) from 0.12.2 to 0.12.3.
- [Release notes](https://github.com/graphql/graphiql/releases)
- [Changelog](https://github.com/graphql/graphiql/blob/main/CHANGELOG.md)
- [Commits](https://github.com/graphql/graphiql/compare/codemirror-graphql@0.12.2...codemirror-graphql@0.12.3)
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