Update Shakapacker to 9.3.2 to match master

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

Gemfile

@@ -6,7 +6,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby "3.4.6"
 
 gem "react_on_rails", "16.1.1"
-gem "shakapacker", "9.3.0"
+gem "shakapacker", "9.3.2"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails"
 gem "listen"