Doc fix for BI Connector Socket Options

Hi,

I found docs issue where invalid value of '448' is communicated. 

From  https://docs.mongodb.com/bi-connector/current/reference/mongosqld/#cmdoption-mongosqld-filepermissions

    Socket Options
    --filePermissions <mode>
    Default: 448
     Specify the permissions for the Unix domain socket file.

Presumably  '440' was intended, so I cloned the docs-bi-connector repo to fix this via q PR but I cannot find the relevant file there? 

$ pwd

/Users/bob/github/docs-bi-connector/source/includes

$ find . | grep -i option-mongosqld-filePermissions.rst

$

Could someone fix this issue?