style: bump rubocop to 0.32.1

Closes Homebrew/homebrew#41049.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Library/Homebrew/cmd/style.rb

@@ -6,7 +6,7 @@ module Homebrew
       ARGV.formulae.map(&:path)
     end
 
-    Homebrew.install_gem_setup_path! "rubocop", "0.32.0"
+    Homebrew.install_gem_setup_path! "rubocop", "0.32.1"
 
     args = [
       "--format", "simple", "--config",