Bump @blueprintjs/core from 4.20.0 to 5.2.0 in /ui

Bumps [@blueprintjs/core](https://github.com/palantir/blueprint/tree/HEAD/packages/core) from 4.20.0 to 5.2.0.
- [Release notes](https://github.com/palantir/blueprint/releases)
- [Changelog](https://github.com/palantir/blueprint/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/palantir/blueprint/commits/@blueprintjs/[email protected]/packages/core)

---
updated-dependencies:
- dependency-name: "@blueprintjs/core"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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