Add clavinjune as contributor

[clavinjune]

What do you want to change?

Currently I'm in the id_ID team, might as well want to have capability to raise PR and issue to the ghostty project (i.e. #14991)

Why do you want to make this change?

I'd like to contribute more to the community especially ghostty project whether it's at code level or translation level.

I acknowledge that:

• I have read the Contributing Guide and understand the contribution process.
• I have read and agree to follow the AI Usage Policy.
• I wrote this vouch request myself, in my own voice, without AI generating it.

[trag1c]

Vouched in the PR =)

[clavinjune]

thanks a lot!