fix: allow show_verification_ui for flows.settings.after.profile.hooks

[camero2734]

After #4402 was merged, there is no way to get the verification UI to show after the user changes their email.

It seems this was intended, as it's even documented here:
https://www.ory.com/docs/actions/require-verified-address#show-verification-screen-after-address-change

But if you actually configure this (when self-hosting), you get an error that that hook isn't allowed there (I got this both in the officially released oryd/kratos:v1.3.1 image, as well as in a custom build based off of the master branch)

I regenerated the schema via ./script/render-schemas.sh. After this change, the following is now allowed as expected:

selfservice:
  flows:
    settings:
      after:
        profile:
          hooks:
            - hook: show_verification_ui

Related issue(s)

#4402

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