chore(deps): update arrow-pg requirement from 0.1.1 to 0.2.0

Updates the requirements on [arrow-pg](https://github.com/datafusion-contrib/datafusion-postgres) to permit the latest version.
- [Release notes](https://github.com/datafusion-contrib/datafusion-postgres/releases)
- [Commits](datafusion-contrib/datafusion-postgres@arrow-pg-v0.1.1...arrow-pg-v0.2.0)

---
updated-dependencies:
- dependency-name: arrow-pg
  dependency-version: 0.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -90,7 +90,7 @@ rustls-pki-types = { version = "1.10" }
 rusqlite = { version = "0.36.0", features = ["column_decltype"] }
 ## for duckdb example
 duckdb = { version = "1.0.0" }
-arrow-pg = "0.1.1"
+arrow-pg = "0.2.0"
 
 ## for loading custom cert files
 rustls-pemfile = "2.0"