This fixes #37430 as I go through the guide. Only one thing is not resolved there but in my POV it's better not have it and leave it on the reader.

Also it seems that the default users was maybe changed in dev mode of Keycloak so I update it but the testing part using curl for get token but the guide setting the keycloak address to `http://localhost:8180`. I would assume this addres is when testing using own keycloak. In that case guide pointing to quickstart ream file which have user `admin` and `alice`.

Maybe it would be nice to update the reamls configs in quickstart and quarkus test be aligned with the dev mode. Probably up to discussion but if we want it I can find some time in next two week to do it.

Also the `` `ProtectedResource`'s`` is updated because it show in text like `` `ProtectedResource's`` . It's probably some edge case in ascii.