Add all web5 language SDKs to the PR template

[tomdaffurn]

Add Go, Rust, and Dart to the checklist of web5 repos to test against.

Old list

https://github.com/TBD54566975/web5-js https://github.com/TBD54566975/web5-kt https://github.com/TBD54566975/web5-swift

New list

• [x] https://github.com/TBD54566975/web5-go
• [x] https://github.com/TBD54566975/web5-js
• [x] https://github.com/TBD54566975/web5-kt
• [x] https://github.com/TBD54566975/web5-swift
• [x] https://github.com/TBD54566975/web5-dart