Update link in Metadata Text Guidelines section to point to the guidelines instead of old document

[jggautier]

What steps does it take to reproduce the issue?

• When does this issue occur?
  When visiting the Metadata Text Guidelines section in the Style Guide and clicking on the link to view the guidelines

• Which page(s) does it occurs on?
  The Metadata Text Guidelines section in the Style Guide at https://guides.dataverse.org/en/5.13/style/text.html#metadata-text-guidelines

• What happens?
  The link to the Google Doc that contains the guidelines takes folks to a Google Doc at https://docs.google.com/document/d/1uRk_dAZlaCS91YFbqE6L9Jwhwum7mOadkJ59XUx40Sg that points users to a second Google Doc where the guidelines are being maintained

• To whom does it occur (all users, curators, superusers)?
  All users

• What did you expect to happen?
  The link takes folks to the Google Doc where the guidelines are being maintained

Which version of Dataverse are you using?
v5.13

Any related open or closed issues to this bug report?
I don't think there are any related issues