Fixed #19926 -- Fixed a link to code example in queries docs

Thanks Randy Salvo for the report.

docs/topics/db/queries.txt

@@ -824,7 +824,7 @@ precede the definition of any keyword arguments. For example::
     The `OR lookups examples`_ in the Django unit tests show some possible uses
     of ``Q``.
 
-    .. _OR lookups examples: https://github.com/django/django/blob/master/tests/modeltests/or_lookups/tests.py
+    .. _OR lookups examples: https://github.com/django/django/blob/master/tests/or_lookups/tests.py
 
 Comparing objects
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