Latest is not the latest actually

In the README it is said that the default value for the `version` input is `latest`, though it's not the case anymore after https://github.com/algolia/setup-algolia-cli/commit/ecd8ce364b0b18dda462fd3edfa94d0c7da17838 (a fix for #1).

https://github.com/algolia/setup-algolia-cli/blob/ecd8ce364b0b18dda462fd3edfa94d0c7da17838/action.yml#L6-L10

Ideally, the proper implementation for `latest` is awaited. Though it may be not so straightforward as described in [the docs](https://docs.github.com/en/repositories/releasing-projects-on-github/linking-to-releases) because the file name is not static.

Anyhow, having outdated `1.2.0` as a hard-coded default version doesn't make much sense because the CLI evolves constantly. Currently it's 1.4.2. You'd have to create a new version of this action every time a new version of CLI comes out.

Or at least a correction of the README is necessary to avoid confusion. I'd suggest removing the default altogether in this case.

Lies die README zusammen mit action.yml, insbesondere den im Issue verlinkten Version-Input in den Zeilen 6–10. Ermittle, ob der dokumentierte Default dem tatsächlichen Verhalten der Action entspricht; abgeschlossen bedeutet, dass Nutzer hinsichtlich des Defaults nicht mehr in die Irre geführt werden, wobei das Issue vorschlägt, ihn aus der README zu entfernen, falls die Implementierung unverändert bleibt.

Vom Indexierungsmodell aus dem Issue-Text verfasst.