Build(deps): Bump codemirror-graphql from 0.14.0 to 0.15.2 in /website (#10020)
Bumps [codemirror-graphql](https://github.com/graphql/graphiql) from 0.14.0 to 0.15.2.
- [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@0.14.0...codemirror-graphql@0.15.2)
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