Add cross-platform support to Gemfile.lock

Add arm64-darwin and x86_64-linux-gnu platforms to ensure
proper gem installation across macOS (ARM) and Linux systems.

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

Gemfile.lock

@@ -453,9 +453,11 @@ GEM
     zeitwerk (2.7.3)
 
 PLATFORMS
+  arm64-darwin
   arm64-darwin-22
   ruby
   x86_64-linux
+  x86_64-linux-gnu
 
 DEPENDENCIES
   autoprefixer-rails