Documentation fixes related to migration

[jasmdk]

Signed-off-by: Jacob Stampe Mikkelsen [email protected]

What does this change

Correct wrong links in storage migration docs

What issue does it fix

Wrong links

Notes for the reviewer

None

Checklist

• [-] Did you write tests?
• [+] Did you write documentation?
• [-] Did you change porter.yaml or a storage document record? Update the corresponding schema file.
• [-] If this is your first pull request, please add your name to the bottom of our Contributors list. Thank you for making Porter better! 🙇‍♀️

Reviewer Checklist

• Comment with /azp run test-porter-release if a magefile or build script was modified
• Comment with /azp run porter-integration if it's a non-trivial PR

[carolynvs]

Thanks!