Update templates.rst

Author: zairigimad

templates.rst

@@ -497,6 +497,8 @@ provided by Symfony:
                 <!-- special options defined by Symfony to set the page cache -->
                 <default key="maxAge">86400</default>
                 <default key="sharedAge">86400</default>
+                 <!-- Whether or not caching should apply for client caches only -->
+                <default key="private">true</default>
             </route>
         </routes>
 
@@ -516,6 +518,9 @@ provided by Symfony:
                     // special options defined by Symfony to set the page cache
                     'maxAge'    => 86400,
                     'sharedAge' => 86400,
+                    
+                    // Whether or not caching should apply for client caches only
+                    'private' => true,
                 ])
             ;
         };