Fix install_folder path in generator initializer template

The generator was setting install_folder to include the framework subdirectory
(e.g., e2e/cypress), but the correct path should be just the install folder
(e.g., e2e) where the cypress.config.js file is located.

This fixes the issue where Cypress couldn't find the config file after
running the install generator.

Fixes #201

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

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

Author: justin808

lib/generators/cypress_on_rails/templates/config/initializers/cypress_on_rails.rb.erb

@@ -1,7 +1,7 @@
 if defined?(CypressOnRails)
   CypressOnRails.configure do |c|
     c.api_prefix = "<%= options.api_prefix %>"
-    c.install_folder = File.expand_path("#{__dir__}/../../<%= options.install_folder %>/<%= options.framework %>")
+    c.install_folder = File.expand_path("#{__dir__}/../../<%= options.install_folder %>")
     # WARNING!! CypressOnRails can execute arbitrary ruby code
     # please use with extra caution if enabling on hosted servers or starting your local server on 0.0.0.0
     c.use_middleware = !Rails.env.production?