Update URLs to django documn version

templates/manywallets.html

@@ -25,7 +25,7 @@ otherwise they come from *ref statements in survex files as of the most recent d
 {% endfor %}</ul>
 
 <!-- This should all be restructured to use .prefetch_related() and .select_related()
-see https://docs.djangoproject.com/en/3.2/ref/models/querysets/#prefetch-related
+see https://docs.djangoproject.com/en/dev/ref/models/querysets/#prefetch-related
 -->
 <table width=95%>
 <tr><th>Scans folder</th><th>Files</th><th>Survex blocks</th><th>Cave</th></tr>

templates/personexpedition.html

@@ -72,7 +72,7 @@ If anyone really cares, they can always look in the original survex file
 e.g. see <a href="/personexpedition/Wookey/1999">Wookey 1999</a> where there are one eiscream survex block on 5th August in eiscream.svx
 <br>It duplicates it. Also on 4th Aug. there is only one block, but it gets shown twice.
 
-<p>The interaction of django database query idioms with <a href="https://docs.djangoproject.com/en/1.11/ref/templates/api/">django HTML templating language</a> is a bit impenetrable here. 
+<p>The interaction of django database query idioms with <a href="https://docs.djangoproject.com/en/dev/ref/templates/api/">django HTML templating language</a> is a bit impenetrable here. 
 I blame Aaron Curtis who was too fond of being clever with the Django templating system 
 instead or writing it in python anyone could understand.<br>
 - The template is in <var>troggle/templates/personexpedition.html</var>