Bump moment and @decidim/core

Bumps [moment](https://github.com/moment/moment) and [@decidim/core](https://github.com/decidim/decidim/tree/HEAD/packages/core). These dependencies needed to be updated together.

Updates `moment` from 2.29.1 to 2.29.4
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](moment/moment@2.29.1...2.29.4)

Updates `@decidim/core` from 0.26.1 to 0.27.0-rc1
- [Release notes](https://github.com/decidim/decidim/releases)
- [Changelog](https://github.com/decidim/decidim/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/decidim/decidim/commits/HEAD/packages/core)

---
updated-dependencies:
- dependency-name: moment
  dependency-type: indirect
- dependency-name: "@decidim/core"
  dependency-type: direct:production
...

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