Update docker.io/cashubtc/mintd Docker tag to v0.14.2

[robwoodgate]

Raised on behalf of @TheRealCheebs

PR Tasks

• Open PR
• run npm run test --> no failing unit tests
• run npm run lint --> no warnings or errors
• run npm run format
• run npm run api:check --> run npm run api:update for changes to the API

[TheRealCheebs]

Thanks, now we just need Renovate to open this PR correctly. But looks good, and that the integration tests passed with the updated mintd version.

[robwoodgate]

@Egge21M - this PR should have been opened by renovate, but Cheebs thinks there is a permission problem as it could create the branch, but not the PR.