The link to "transaction UML" in the docs' TOC is broken

[fresheneesz]

Describe the bug
In the table of contents, the link to "transaction UML" is broken. I also don't see anywhere that clearly explains the protocol for a mimblewimble transaction (specifically what steps there are in the back-and-forth, and what data is sent in those steps). I assumed that's what the link to "transaction UML" was for.

[lehnberg]

Thank you for raising an issue about this! This is probably due to a move of wallet into it's own repo, /grin-wallet. The correct link to the transaction UML is here: https://github.com/mimblewimble/grin-wallet/blob/master/doc/transaction/basic-transaction-wf.png

Would you mind raising a PR to fix this?

[fresheneesz]

Alright, created a PR: #2798

[lehnberg]

Awesome - looks it's merged already! Closing this one now, thanks for your help @fresheneesz!