Bump immutable from 4.3.8 to 4.3.9 (#42720)

Bumps [immutable](https://github.com/immutable-js/immutable-js) from 4.3.8 to 4.3.9.
- [Release notes](https://github.com/immutable-js/immutable-js/releases)
- [Changelog](https://github.com/immutable-js/immutable-js/blob/main/CHANGELOG.md)
- [Commits](immutable-js/immutable-js@v4.3.8...v4.3.9)

---
updated-dependencies:
- dependency-name: immutable
  dependency-version: 4.3.9
  dependency-type: indirect
...

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Author: dependabot[bot]