Fixes an issue in the bring your own fees implementation. Swaps with 1 satoshi or 1 planck would fail.

Release
https://github.com/interlay/interbtc/releases/tag/1.24.0-hotfix2

Changes
https://github.com/interlay/interbtc/compare/1.24.0-hotfix...1.24.0-hotfix2

Request to fast-track
Since this is a fix of a bug of an existing functionality, we request fast-track by the TC.