Merge pull request #9084 from Homebrew/sorbet-files-update

sorbet: Update RBI files.

Library/Homebrew/sorbet/rbi/hidden-definitions/hidden.rbi

@@ -5523,6 +5523,8 @@ class Cask::Cask
   def dictionary(&block); end
+  def discontinued?(&block); end
+
   def font(&block); end
   def homepage(&block); end
@@ -5715,6 +5717,8 @@ class Cask::DSL::Caveats
   def discontinued(*args); end
+  def discontinued?(); end
+
   def files_in_usr_local(*args); end
   def free_license(*args); end