Bump codemirror from 5.50.2 to 5.51.0 in /website (#7404)
Bumps [codemirror](https://github.com/codemirror/CodeMirror) from 5.50.2 to 5.51.0.
- [Release notes](https://github.com/codemirror/CodeMirror/releases)
- [Changelog](https://github.com/codemirror/CodeMirror/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codemirror/CodeMirror/compare/5.50.2...5.51.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>