Updated PostgreSQL (15.3)

lib/docs/scrapers/postgresql.rb

@@ -51,12 +51,12 @@ module Docs
       /\Aunsupported-features/ ]
 
     options[:attribution] = <<-HTML
-      &copy; 1996&ndash;2022 The PostgreSQL Global Development Group<br>
+      &copy; 1996&ndash;2023 The PostgreSQL Global Development Group<br>
       Licensed under the PostgreSQL License.
     HTML
 
     version '15' do
-      self.release = '15.0'
+      self.release = '15.3'
       self.base_url = "https://www.postgresql.org/docs/#{version}/"
     end