build(deps): bump pg from 1.5.6 to 1.5.7 (#4567)

Bumps [pg](https://github.com/ged/ruby-pg) from 1.5.6 to 1.5.7.
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.md)
- [Commits](ged/ruby-pg@v1.5.6...v1.5.7)

---
updated-dependencies:
- dependency-name: pg
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -10,7 +10,7 @@ end
 # User management and login workflow.
 gem "devise", '>= 4.7.1'
 # Postgres database adapter.
-gem "pg", "~> 1.5.6"
+gem "pg", "~> 1.5.7"
 # Web server.
 gem "puma"
 # Rails web framework.

Gemfile.lock

@@ -445,7 +445,7 @@ GEM
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
-    pg (1.5.6)
+    pg (1.5.7)
     popper_js (2.11.8)
     prawn (2.4.0)
       pdf-core (~> 0.9.0)
@@ -761,7 +761,7 @@ DEPENDENCIES
   orderly (~> 0.1)
   paper_trail
   pdf-reader
-  pg (~> 1.5.6)
+  pg (~> 1.5.7)
   prawn-rails
   pry-doc
   pry-nav