Bump linkify-it from 2.2.0 to 3.0.2 in /webapp

Bumps [linkify-it](https://github.com/markdown-it/linkify-it) from 2.2.0 to 3.0.2.
- [Release notes](https://github.com/markdown-it/linkify-it/releases)
- [Changelog](https://github.com/markdown-it/linkify-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/linkify-it@2.2.0...3.0.2)

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