docs: fix omissions in the description

[issotina]

Related issue

Proposed changes

small corrections on the documentation of consent flow but which improves consistency

Checklist

• I have read the contributing guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
  confirm that I got green light (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further comments

[CLAassistant]

All committers have signed the CLA.

[vinckr]

Thanks so much for your contribution!

Could you please make the same changes in the /docs/docs as well: https://github.com/ory/hydra/blob/master/docs/docs/concepts/consent.mdx

This is the source for versioned docs, so your fix will be in future doc versions too :-).

[aeneasr]

@vinckr could you just quickly do the changes in another PR? Then we could merge right away

[issotina]

@aeneasr done as you suggested
#2194