Remove versionbot reference from the README

Change-type: minor

README.md

@@ -38,7 +38,6 @@ Inputs are provided using the `with:` section of your workflow YML file.
 | fleet | The slug of the fleet (eg: `my_org/sample_fleet`) for which the release is for | true | |
 | environment | Domain of API hosting your fleets | false | balena-cloud.com |
 | cache | If a release matching the commit already exists do not build again | false | true |
-| versionbot | Tells action to use Versionbot branch for versioning | false | false |
 | create_tag | Create a tag on the git commit with the final release version | false | false |
 | source | Specify a source directory (for `Dockerfile.template` or `docker-compose.yml`) | false | root directory |
 | layer_cache | Use cached layers of previously built images for this project | false | true |