v1.1.1

Metadata and documentation only. No change to the action's behavior, inputs, or outputs.

action.yml now describes what the action has done since v1.1.0: run translations in CI or gate a pull request on locale drift. The old description mentioned translation only, so the Marketplace listing hid the read-only check and diff gate that v1.1.0 shipped. The command input itself is unchanged.

Also refreshes the README, contributing guide, and security policy carried at the release tag, and folds the version bump into the release commit, so package.json and package-lock.json now read the version they ship at instead of the previous one.

verbatra/action@v1 moves to this release.