Add nokogiri version constraints to all gemfiles

Add Ruby version-specific nokogiri constraints to ensure compatibility:
- nokogiri ~> 1.15.0 for Ruby < 3.0
- nokogiri ~> 1.17.0 for Ruby >= 3.0

This extends the constraint added to the main Gemfile to all the
test gemfiles used for different configurations.

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

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

Author: justin808

gemfiles/base.gemfile

@@ -4,4 +4,8 @@ source "http://rubygems.org"
 
 gem "rails", "~> 7.0.x"
 
+# Nokogiri version constraints for different Ruby versions
+gem "nokogiri", "~> 1.15.0" if RUBY_VERSION < "3.0"
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec path: "../"

gemfiles/propshaft.gemfile

@@ -4,4 +4,8 @@ source "http://rubygems.org"
 
 gem "propshaft", "~> 1.0.x"
 
+# Nokogiri version constraints for different Ruby versions
+gem "nokogiri", "~> 1.15.0" if RUBY_VERSION < "3.0"
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec path: "../"

gemfiles/shakapacker.gemfile

@@ -4,4 +4,8 @@ source "http://rubygems.org"
 
 gem "shakapacker", "7.2.0"
 
+# Nokogiri version constraints for different Ruby versions
+gem "nokogiri", "~> 1.15.0" if RUBY_VERSION < "3.0"
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec path: "../"

gemfiles/sprockets_3.gemfile

@@ -7,4 +7,8 @@ gem "sprockets-rails"
 gem "turbolinks", "~> 5"
 gem "mini_racer", platforms: :mri
 
+# Nokogiri version constraints for different Ruby versions
+gem "nokogiri", "~> 1.15.0" if RUBY_VERSION < "3.0"
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec path: "../"

gemfiles/sprockets_4.gemfile

@@ -7,4 +7,8 @@ gem "sprockets-rails"
 gem "turbolinks", "~> 5"
 gem "mini_racer", platforms: :mri
 
+# Nokogiri version constraints for different Ruby versions
+gem "nokogiri", "~> 1.15.0" if RUBY_VERSION < "3.0"
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec path: "../"