[doc] Add python2 label to doc

Change-Id: I72c4b8279501bd60ae47da3dbe1e783901681f65
---
M HISTORY.rst
M docs/glossary.rst
2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/HISTORY.rst b/HISTORY.rst
index c636c11..9890a6a 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -475,6 +475,7 @@
 * Bugfixes and improvements
 * Localisation updates
 
+.. _python2:
 
 3.0.20200703
 ------------
diff --git a/docs/glossary.rst b/docs/glossary.rst
index b6290d1..c320253 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -35,7 +35,7 @@
       - the :mod:`pwb` wrapper script
 
    python2
-      A :term:`tag` for the last Pywikibot release `3.0.20200703`
+      A :term:`tag` for the last Pywikibot release :ref:`3.0.20200703<python2>`
       supporting Python 2 (Python 2.7.3 - 2.7.18). Ask for `Python 2 to
       3 support <https://phabricator.wikimedia.org/T242120>`_ to
       convert your old scripts.

