Bump codemirror-graphql from 0.9.0 to 0.11.1 in /website (#6615)
Bumps [codemirror-graphql](https://github.com/graphql/graphiql) from 0.9.0 to 0.11.1.
- [Release notes](https://github.com/graphql/graphiql/releases)
- [Changelog](https://github.com/graphql/graphiql/blob/master/CHANGELOG.md)
- [Commits](https://github.com/graphql/graphiql/compare/v0.9.0...codemirror-graphql@0.11.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>