chore(docs) fix custom sign in redirect (#11053)
* chore(docs) fix custom sign in redirect
* Update docs/pages/guides/pages/signin.mdx
Co-authored-by: Nico Domino <yo@ndo.dev>
* Update signin.mdx
* Update signin.mdx
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Co-authored-by: Nico Domino <yo@ndo.dev>
Co-authored-by: Balázs Orbán <info@balazsorban.com>
