Bump pg from 1.5.5 to 1.5.6

Bumps [pg](https://github.com/ged/ruby-pg) from 1.5.5 to 1.5.6.
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.md)
- [Commits](ged/ruby-pg@v1.5.5...v1.5.6)

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

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

Gemfile

@@ -28,7 +28,7 @@ gem 'rdf-vocab', '~> 3.3.0' # this gem changed predicate names without warning,
 
 # Database stuff
 gem 'connection_pool'
-gem 'pg', '~> 1.5.5'
+gem 'pg', '~> 1.5.6'
 gem 'redis', '~> 4.8'
 gem 'rsolr'
 gem 'strong_migrations', '~> 1.7.0'

Gemfile.lock

@@ -376,7 +376,7 @@ GEM
     parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
-    pg (1.5.5)
+    pg (1.5.6)
     prism (0.24.0)
     psych (5.1.0)
       stringio
@@ -650,7 +650,7 @@ DEPENDENCIES
   omniauth-rails_csrf_protection (~> 1.0)
   omniauth-saml (~> 2.1)
   paper_trail (~> 15.1.0)
-  pg (~> 1.5.5)
+  pg (~> 1.5.6)
   puma (~> 6.4)
   pundit (= 2.3.1)
   rails (~> 7.0.8)