ICS20: Correction to the denom in the sequence diagram

[ivan-gavran]

This PR addresses one imprecision in ICS20 README that may cause confusion in otherwise very helpful sequence diagram example.

In the diagram illustrating multi-chain token transfer, there is a mistake in the denoms (in the last transaction):

• B should be burning transfer/ChannelToA/denom (instead of transfer/ChannelToB/transfer/ChannelToA/denom)
• B should be sending to A transfer/ChannelToA/denom (instead of transfer/ChannelToB/transfer/ChannelToA/denom)
• A should be unlocking denom (instead of transfer/channelToA/denom)

[chipshort]

Nice finding, I just stumbled upon the same thing.
I'm not a maintainer here, but some suggestions inline.

[ivan-gavran]

Nice finding, I just stumbled upon the same thing. I'm not a maintainer here, but some suggestions inline.

Thanks for paying such a close attention!