Bump psych from 3.3.4 to 4.0.6

Bumps [psych](https://github.com/ruby/psych) from 3.3.4 to 4.0.6.
- [Release notes](https://github.com/ruby/psych/releases)
- [Commits](ruby/psych@v3.3.4...v4.0.6)

---
updated-dependencies:
- dependency-name: psych
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile

@@ -13,7 +13,7 @@ gem 'pg', '~> 0.21'
 
 # This can only be removed with Rails 7.0
 gem 'mail', '< 2.8.0'
-gem 'psych', '< 4.0'
+gem 'psych', '< 5.0'
 
 # Use SCSS for stylesheets
 gem 'sass-rails'

Gemfile.lock

@@ -224,7 +224,8 @@ GEM
     prawn_rails (0.0.12)
       prawn (>= 0.11.1)
       railties (>= 3.0.0)
-    psych (3.3.4)
+    psych (4.0.6)
+      stringio
     public_suffix (5.0.1)
     puma (6.3.1)
       nio4r (~> 2.0)
@@ -369,6 +370,7 @@ GEM
     state_machines-yard (0.0.1)
       state_machines-graphviz
       yard
+    stringio (3.1.7)
     temple (0.9.1)
     thor (1.2.1)
     thread_safe (0.3.6)
@@ -431,7 +433,7 @@ DEPENDENCIES
   pg (~> 0.21)
   prawn (~> 0.13.0)
   prawn_rails
-  psych (< 4.0)
+  psych (< 5.0)
   puma
   rails (>= 5.1.7, < 5.1.99)
   rails-i18n