2.0 migration tutorial should mention removal of --json argument from commands

In 1.X I used to use `--json path/to/file.json` with commands like `conan create`. With 2.0 I suppose I am expected to use `--format json` and redirect stdout to a file? So `conan create --json x.json` would turn into `conan create -f json > x.json`.
If that is the case, I believe it should be mentioned in [Conan migration guide to 2.0 » Commands](https://docs.conan.io/1/migrating_to_2.0/commands.html).