Release arrow-rs / parquet Minor version `60.2.0` (October 2026)

Let's keep the code flowing. Part of
- https://github.com/apache/arrow-rs/issues/7392

## Release Checklist:
- [ ] Release notes and bump version:
- [ ] Verify with downstream DataFusion tests:
- [ ] Release Candidate + Vote thread:
- [ ] Release to crates.io / approval:
- [ ] Create follow on tickets

## Required items for release
- [ ] None yet

## Requested items for release
- [ ] None yet

Start with the release checklist in this issue and review the related umbrella issue #7392. Work through version and release-note updates, downstream DataFusion verification, the release-candidate vote, crates.io publication, and follow-on tickets; completion means each applicable checklist item is resolved.

Written by the indexing model from the issue text.