Update doc/sphinx-guides/source/versions.rst

Co-authored-by: Philip Durbin <[email protected]>

Author: stevenwinship

doc/sphinx-guides/source/versions.rst

@@ -8,7 +8,7 @@ This list provides a way to refer to the documentation for previous and future v
 
 - pre-release `HTML (not final!) <http://preview.guides.gdcc.io/en/develop/>`__ and `PDF (experimental!) <http://preview.guides.gdcc.io/_/downloads/en/develop/pdf/>`__ built from the :doc:`develop </developers/version-control>` branch :doc:`(how to contribute!) </contributor/documentation>`
 - 6.6
-- `6.6 </en/6.6/>`__
+- `6.5 </en/6.5/>`__
 - `6.4 </en/6.4/>`__
 - `6.3 </en/6.3/>`__
 - `6.2 </en/6.2/>`__