feat: update bitkeep adapter

Hi hippospace team,

This PR upgrade the Bitkeep adapter as 'Bitkeep Wallet' has been rebranded to 'Bitget Wallet'.

Bitget Wallet team

Type of Change:

New Feature

Checklist:

[x] My code follows the project's style guidelines
[x] I have performed a self-review of my own code
[x] I have made corresponding changes to the documentation
[x] My changes generate no new warnings or errors
[x] I have added comments to my code as a warning against using deprecated exports.

hippospace / aptos-wallet-adapter