Add tBTC ERC20 token to the drop-down list when selecting a token for a grant

As a member of the Keep Network community, I want to ask you to add a tBTC token to the drop-down list of tokens that the grant accepts, so that Keep community members could create and contribute to grants using the tBTC token.

*Summary*:

I represent the interests of the Keep Network community here and we are happy that we already can launch grants with the ability to raise funds in KEEP tokens. The Keep ecosystem also includes the tBTC app, which serves as a bridge between the Bitcoin and Ethereum network. The tBTC token is popular not only within our community, but also outside of it. For example, Coinbase has already paid attention to tBTC: https://blog.coinbase.com/coinbase-custody-explores-support-for-new-digital-assets-d3b521bc6816. We would be happy to be able to create bounties, grants, and quizes using tBTC.

*Type*: Feature