Update translations.json

Added Bahasa Indonesia for the first time.

Description

[ ] I have read and followed the Contributing Guide
[ ] I have read and accept the Code of Conduct (TLDR: just behave in a friendly manner)
[ ] My code follows the general style of this project (explained here)
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation (if applicable)
[ ] I ensured that the automated checks that ran on this PR have completed successfully
[ ] I added myself to the package.json file (optional but highly encouraged :)

^ Please complete the checklist to the best of your abilities ^