Version 3.27.2

• 🛠 Discount Codes docs
• 📚 add link to Channel API
• 🛠 [core-5497] Add pet fee

• 🛠 Bump nokogiri from 1.10.8 to 1.13.4
• 🛠 Bump addressable from 2.5.2 to 2.8.0
• 🛠 Bump kramdown from 1.3.2 to 2.3.0
• 🛠 Bump rack from 2.2.2 to 2.2.3