Bump matrix-js-sdk from 21.1.0 to 21.2.0 (#993)

Bump matrix-js-sdk from 21.1.0 to 21.2.0 (#993)

Bumps [matrix-js-sdk](https://github.com/matrix-org/matrix-js-sdk) from 21.1.0 to 21.2.0.
- [Release notes](https://github.com/matrix-org/matrix-js-sdk/releases)
- [Changelog](https://github.com/matrix-org/matrix-js-sdk/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/matrix-org/matrix-js-sdk/compare/v21.1.0...v21.2.0)

---
updated-dependencies:
- dependency-name: matrix-js-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>