fix desc

Author: rustagir

source/builders.txt

@@ -123,7 +123,8 @@ This example performs the following actions:
 - Uses the ``Query::eq()`` factory method to match documents in which
   the ``feature_type`` field value is ``'Wrecks - Visible'``
 - Uses the ``Query::near()`` factory method to match documents in which
-  the ``feature_type`` field value is ``'Wrecks - Visible'``
+  the ``coordinates`` location field is within ``10000`` meters of the
+  specified coordinates
 - Calls the :phpmethod:`MongoDB\Collection::find()`
   method to retrieve the matching documents
 - Prints the matching documents