openapi version is set to main instead of current version

[lfse-slafleur]

In version 0.0.2-beta the version is set to main in openapi.yaml: https://github.com/flexiblepower/s2-ws-json/blob/v0.0.2-beta/s2-schemas-in-openapi-format/s2-ws-json-openapi.yml#L4

It should be set to 0.0.2-beta