Bump pg from 1.2.1 to 1.2.2 (#12854)
Bumps [pg](https://github.com/ged/ruby-pg) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.rdoc)
- [Commits](https://github.com/ged/ruby-pg/compare/v1.2.1...v1.2.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>