Update Angular documentation (21.2.0)

Author: simon04

lib/docs/scrapers/angular.rb

@@ -100,7 +100,7 @@ def self.handle_redirects(version)
     end
 
     version do
-      self.release = '21.0.3'
+      self.release = '21.2.0'
       self.base_url = 'https://angular.dev/'
       self.root_path = 'overview'