[1.5.x] Fixed #21440 -- Typo in topics/http/shortcuts.txt

Thanks olof.bjarnason at gmail.com for the report.

Backport of 6e9e6ca071 from master

docs/topics/http/shortcuts.txt

@@ -81,7 +81,7 @@ This example is equivalent to::
 
     def my_view(request):
         # View code here...
-        t = loader.get_template('myapp/template.html')
+        t = loader.get_template('myapp/index.html')
         c = RequestContext(request, {'foo': 'bar'})
         return HttpResponse(t.render(c),
             content_type="application/xhtml+xml")