Release version`0.38.0` of `sqlparser-rs`

[alamb]

Follow on to #925

Filing a ticket here to track the work of a release (mostly so others can follow along)

Target Release Date: Approximately 2023-09-23

Release instructions: https://github.com/sqlparser-rs/sqlparser-rs/blob/main/docs/releasing.md

Steps:

• Make a PR to update CHANGELOG.md: Changelog for 0.38.0 release #973
• run cargo release
• verify the new release is on crates.io https://crates.io/crates/sqlparser/0.38.0
• Make ticket for next release: Release version0.39.0 of sqlparser-rs #974

[alamb]

The release is on crates.ip: https://crates.io/crates/sqlparser/0.38.0 🎉