Bump bootstrap from 5.2.0-beta1 to 5.3.6

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 5.2.0-beta1 to 5.3.6.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v5.2.0-beta1...v5.3.6)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-version: 5.3.6
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]