[1.6.x] Fixed #20949 -- Typo #2 in docstring

Backport of 0073f1d from master

django/template/loader_tags.py

@@ -206,7 +206,7 @@ def do_extends(parser, token):
     uses the literal value "base" as the name of the parent template to extend,
     or ``{% extends variable %}`` uses the value of ``variable`` as either the
     name of the parent template to extend (if it evaluates to a string) or as
-    the parent tempate itself (if it evaluates to a Template object).
+    the parent template itself (if it evaluates to a Template object).
     """
     bits = token.split_contents()
     if len(bits) != 2: