Bump VERSION to 1.43.2

Diff

1.43.1...7c7c5819

Checklist

• Diff link is up-to-date.
• Check the release notes: https://gitlab.com/api/v4/projects/3430480/repository/changelog?version=1.43.2
• Based on the diff and the release notes, version.rb is updated, according to SemVer.

1.43.2 (2024-06-24)

Fixed (1 change)

• Use labels argument for MergeRequestsResolverNegatedParams (merge request)