Bump vuepress-theme-hope from 2.0.0-rc.19 to 2.0.0-rc.20

Bumps [vuepress-theme-hope](https://github.com/vuepress-theme-hope/vuepress-theme-hope/tree/HEAD/packages/theme) from 2.0.0-rc.19 to 2.0.0-rc.20.
- [Release notes](https://github.com/vuepress-theme-hope/vuepress-theme-hope/releases)
- [Changelog](https://github.com/vuepress-theme-hope/vuepress-theme-hope/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vuepress-theme-hope/vuepress-theme-hope/commits/v2.0.0-rc.20/packages/theme)

---
updated-dependencies:
- dependency-name: vuepress-theme-hope
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>