Bump immutable

Bumps  and [immutable](https://github.com/immutable-js/immutable-js). These dependencies needed to be updated together.

Updates `immutable` from 3.8.2 to 3.8.3
- [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@v3.8.2...v3.8.3)

Updates `immutable` from 5.1.3 to 5.1.5
- [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@v3.8.2...v3.8.3)

---
updated-dependencies:
- dependency-name: immutable
  dependency-version: 3.8.3
  dependency-type: indirect
- dependency-name: immutable
  dependency-version: 5.1.5
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]