Fix dead link on config flow page

[IceBotYT]

Proposed change

Fixes a dead link on this page

Type of change

• [ ] Document existing features within Home Assistant
• [ ] Document new or changing features which there is an existing pull request elsewhere
• [x] Spelling or grammatical corrections, or rewording for improved clarity
• [ ] Changes to the backend of this documentation
• [ ] Removed stale or deprecated documentation

Additional information

• This PR fixes or closes issue: fixes #
• Link to relevant existing code or pull request:

Summary by CodeRabbit

• Documentation
  • Updated a reference link in the OAuth reauthentication documentation to ensure accurate guidance for users.