Update templates.rst

Co-Authored-By: Oskar Stark <oskarstark@googlemail.com>

Author: zairigimad

templates.rst

@@ -477,7 +477,7 @@ provided by Symfony:
                 maxAge:    86400
                 sharedAge: 86400
                 
-                # Whether or not caching should apply for client caches only
+                # whether or not caching should apply for client caches only
                 private: true 
 
     .. code-block:: xml