Bump pghero from 3.1.0 to 3.2.0

Bumps [pghero](https://github.com/ankane/pghero) from 3.1.0 to 3.2.0.
- [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/v3.1.0...v3.2.0)

---
updated-dependencies:
- dependency-name: pghero
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colorize (0.8.1)
-    concurrent-ruby (1.2.0)
+    concurrent-ruby (1.2.2)
     connection_pool (2.3.0)
     crass (1.0.6)
     cssbundling-rails (1.1.2)
@@ -277,7 +277,7 @@ GEM
     parser (3.2.1.0)
       ast (~> 2.4.1)
     pg (1.4.6)
-    pghero (3.1.0)
+    pghero (3.2.0)
       activerecord (>= 6)
     prometheus-client (4.0.0)
     public_suffix (4.0.7)