Convert yaml to psych

--- lib/pagy/modules/i18n/i18n.rb.orig	2026-09-23 10:53:05 UTC
+++ lib/pagy/modules/i18n/i18n.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require 'yaml'
+require 'psych'
 require_relative 'p11n'
 
 class Pagy
@@ -49,7 +49,7 @@ class Pagy
         return locales[locale] = locales['en'] || load(locale: 'en')
       end
 
-      dictionary = YAML.load_file(path)[locale]
+      dictionary = Psych.load_file(path)[locale]
       raise KeyError, "missing 'pagy' key in #{locale.inspect} locale" unless dictionary['pagy']
 
       p11n = dictionary['pagy'].delete('p11n')
--- pagy.gemspec.orig	2026-09-23 10:53:06 UTC
+++ pagy.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |s|
   s.specification_version = 4
 
   s.add_runtime_dependency(%q<json>.freeze, [">= 0".freeze])
+  s.add_runtime_dependency(%q<psych>.freeze, [">= 0".freeze])
   s.add_runtime_dependency(%q<uri>.freeze, [">= 0".freeze])
-  s.add_runtime_dependency(%q<yaml>.freeze, [">= 0".freeze])
 end