DOCS-16037 documentation for --queryFile option (#126)

* DOCSP-16037 documentation for --queryFile option

* Apply suggestions from code review

Co-authored-by: Alison Huh <[email protected]>

---------

Co-authored-by: Alison Huh <[email protected]>

Author: kanchana-mongodb

source/mongoexport.txt

@@ -705,6 +705,12 @@ Options
    You can sort the results with the :option:`--sort` option to
    :binary:`~bin.mongoexport`.
 
+.. option:: --queryFile=<filename>
+
+   An alternative to :option:`--query <mongoexport --query>`. The
+   ``--queryFile`` option allows you to
+   specify in a file the query in :manual:`Extended JSON v2 format
+   </reference/mongodb-extended-json>`. 
 
 
 .. option:: --type=<string>