Backpacks!

Just another small version with some more bug fixes and improved translations in some languages.

• (v1.3.4)
  • Changed:
    • Changed Add to Apply in the English (en_us) B*tch, I'm stylish advancement's description.
    • Improved Brazilian Portuguese (pt_br) translation by @MeiaQuatru.
  • Fixed:
    • Your could dupe or make items disappear when using the backpack in your offhand (only 1.21.5+ bug) (#35).

Note: As always, run /reload after updating datapacks for the changes to apply.