Point at main docs, aim to retire wiki doc pages

Author: peterjc

wiki/Category_Wiki_Documentation.md

@@ -5,6 +5,7 @@ layout: tagpage
 tag: Wiki Documentation
 ---
 
-In addition to the main sources of [documentation](Documentation "wikilink"),
-we have several pages which were originally contributed as wiki pages, on
-a few of the core functions of Biopython:
+In addition to the main [documentation](https://biopython.org/docs/latest/index.html)
+which is all tracked under the main repository, we have several legacy pages which
+were originally contributed as wiki pages. We would like to retire these, porting
+still relevant content to the main documentation: