Bump pghero from 2.2.0 to 2.2.1 (#11033)

Bumps [pghero](https://github.com/ankane/pghero) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/ankane/pghero/releases)
- [Changelog](https://github.com/ankane/pghero/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/pghero/compare/v2.2.0...v2.2.1)

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

Gemfile.lock

@@ -401,7 +401,7 @@ GEM
       equatable (~> 0.5.0)
       tty-color (~> 0.4.0)
     pg (1.1.4)
-    pghero (2.2.0)
+    pghero (2.2.1)
       activerecord
     pkg-config (1.3.7)
     premailer (1.11.1)