Update tapir-core to 1.2.1

[evolution-scala-bot[bot]]

Updates com.softwaremill.sttp.tapir:tapir-core from 1.1.4 to 1.2.1. GitHub Release Notes - Version Diff

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Adjust future updates

Add this to your `.scala-steward.conf` file to ignore future updates of this dependency: ``` updates.ignore = [ { groupId = "com.softwaremill.sttp.tapir", artifactId = "tapir-core" } ] ``` Or, add this to slow down future updates of this dependency: ``` dependencyOverrides = [{ pullRequests = { frequency = "@monthly" }, dependency = { groupId = "com.softwaremill.sttp.tapir", artifactId = "tapir-core" } }] ```

labels: library-update, early-semver-minor, semver-spec-minor, commit-count:1

[evolution-scala-bot[bot]]

Superseded by #52.