Release sqlparser-rs version `0.64.0` around 2026-10-31

Follow on to
- https://github.com/apache/datafusion-sqlparser-rs/issues/2453

This ticket tracks creating the next sqlparser release (mostly so others can follow along)

**Target Release Date**: Approximately 2026-10-31

Release instructions: https://github.com/apache/datafusion-sqlparser-rs/blob/main/dev/release/README.md

Steps:
- [ ] Make a PR to update version / `CHANGELOG.md`:
- [ ] Tested with downstream projects (e.g. DataFusion):
- [ ] Create a Release Candidate (RC) and start vote:
- [ ] (When vote is approved) release to crates.io
- [ ] Make ticket for next release:

Required fixes:
- [ ] None yet 🎉

Start with dev/release/README.md and review the release checklist for version 0.64.0. Coordinate the version and CHANGELOG.md update, downstream testing such as DataFusion, the release candidate vote, and crates.io publication. The issue is done when the approved release is published and the next-release ticket is created.

Written by the indexing model from the issue text.