[PATCH 2 of 3 WEBSITE] Say that we use Python 3, it's been a while now

[Raphaël Gomès]

# HG changeset patch
# User Raphaël Gomès <rgomes at octobus.net>
# Date 1645464503 -3600
#      Mon Feb 21 18:28:23 2022 +0100
# Node ID a2108539f22be784bf7d7a192228589e88f3a81e
# Parent  fb14976f16cade0eb50b00a4f2065666cedab226
# EXP-Topic python2-nuke
Say that we use Python 3, it's been a while now

diff -r fb14976f16ca -r a2108539f22b templates/downloads/index.html
--- a/templates/downloads/index.html	Mon Feb 21 18:27:19 2022 +0100
+++ b/templates/downloads/index.html	Mon Feb 21 18:28:23 2022 +0100
@@ -65,7 +65,7 @@
     <dl>
       <dt>Python</dt>
       <dd>Mercurial uses <a href="https://www.python.org">Python</a>
-          (version <em>2.7</em>). Most ready-to-run Mercurial
+          (version <em>3.5+</em>). Most ready-to-run Mercurial
           distributions include Python or use the Python that comes
           with your operating system.
       </dd>