(DOCSP-47909) Adds limitation for the BI Connector.-v7.0-backport (766) (#781)

# Backport

This will backport the following commits from `master` to `v7.0`:
- [(DOCSP-47909) Adds limitation for the BI Connector.
(#766)](10gen/docs-ops-manager#766)

<!--- Backport version: 9.6.2 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

Author: erabil-mdb

source/tutorial/deploy-bi-connector.txt

@@ -41,6 +41,9 @@ Limitations
   if the automation agent authentication mechanism is 
   Kerberos (``GSSAPI``) authentication.
 
+- The |bic-short-no-link| skips field names that contain a period (.), such as ``price.usd``.
+  Such fields don't appear in the output schema. 
+
 Prerequisites
 -------------