Update gemspec

Author: MuriloDalRi

govspeak.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |s|
   s.summary       = "Markup language for single domain"
   s.description   = 'A set of extensions to markdown layered on top of the kramdown
 library for use in the UK Government Single Domain project'
-  s.required_ruby_version = ">= 3.3"
+  s.required_ruby_version = ">= 3.1.4"
 
   s.files = Dir[
     "lib/**/*",