expose/differentiate author page corrections as a separate issue from paper metadata corrections

[nschneid]

Some people are using the metadata fix dialog to try to address author grouping issues that are not due to paper-level problems. This PR attempts to bring clarity by:

• Renaming the title of the issue type from "author metadata" to "author page"
  • I don't know if there is any downstream automation that will be affected. I did not modify anything in the form itself.
• Explaining in the paper metadata dialog that author page issues should be addressed separately
• Explaining the difference in the author page issue template
• Adding a "Fix data" button to author pages that links to the issue template

In the future we may want to create a dialog for author pages to give us the data in a structured format. The most common issue seems to be name variants that need to be grouped together under the same individual.

[github-actions]

Build successful. Some useful links:

• Complete site preview: https://preview.aclanthology.org/dialog-mention-author-issues
• Potential volumes of interest:

This preview will be removed when the branch is merged.

[mbollmann]

Thanks!