Bump bleach from 6.1.0 to 6.4.0

Bumps [bleach](https://github.com/mozilla/bleach) from 6.1.0 to 6.4.0.
- [Changelog](https://github.com/mozilla/bleach/blob/main/CHANGES)
- [Commits](mozilla/bleach@v6.1.0...v6.4.0)

---
updated-dependencies:
- dependency-name: bleach
  dependency-version: 6.4.0
  dependency-type: indirect
...

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Author: dependabot[bot]