DOCS-5125 Fix syntax for maxTimeMS

Description of maxTimeMS included an alternative to the
shortcut which used incorrect syntax. The incorrect command
did not limit the time for retrieving results and instead
created a inclusive projection on a field named '$maxTimeMS'
which would hopefully not be an actual field in the user
database.

Signed-off-by: kay <[email protected]>

Author: NoOutlet

source/reference/operator/meta/maxTimeMS.txt

@@ -22,7 +22,7 @@ $maxTimeMS
 
    .. code-block:: javascript
 
-      db.collection.find( { } , { $maxTimeMS: 100 } )
+      db.collection.find( { $query: { }, $maxTimeMS: 100 } )
       db.collection.find( { } )._addSpecial("$maxTimeMS", 100)
 
    Interrupted operations return an error message similar to the