Fix broken links from recent Classic UI and Backend documentation

docs/backend/vocabularies.md

@@ -663,17 +663,12 @@ The response includes the `token` and `title` for each term:
 7. **Document your vocabularies** with docstrings explaining what they contain and when to use them.
 
 
-## See Also
-
-- {ref}`backend-fields-label` for field types that use vocabularies
-- {doc}`/classic-ui/forms` for form handling
-- [zope.schema documentation](https://zopeschema.readthedocs.io/en/latest/)
-- [plone.app.vocabularies source code](https://github.com/plone/plone.app.vocabularies)
-- [bobtemplates.plone documentation](https://bobtemplatesplone.readthedocs.io/)
-
-
 ## Related content
 
--   {doc}`/backend/fields`
+-   {doc}`/backend/fields` for field types that use vocabularies
+-   {doc}`/classic-ui/forms` for form handling
+-   [`zope.schema` documentation](https://zopeschema.readthedocs.io/en/latest/)
+-   [`plone.app.vocabularies` source code](https://github.com/plone/plone.app.vocabularies)
+-   [`bobtemplates.plone` documentation](https://bobtemplatesplone.readthedocs.io/)
 -   {doc}`/backend/schemas`
 -   {doc}`/backend/content-types/index`

docs/conf.py

@@ -77,6 +77,7 @@
 smartquotes = False
 
 # Options for the linkcheck builder
+linkcheck_anchors = True
 linkcheck_allowed_redirects = {
     # All HTTP redirections from the source URI to the canonical URI will be treated as "working".
     # Example
@@ -106,6 +107,7 @@
     r"https://stackoverflow.com",  #volto
     r"https://v5.reactrouter.com",  #volto
     r"https://web.archive.org/",
+    r"https://www.gnu.org",
     r"https://www.merriam-webster.com/",
     r"https://www.npmjs.com",  #volto
     # Bad TLS certificate