Update enterprise-member-saml-linked-identities.graphql

Author: stacycarter

graphql/queries/enterprise-member-saml-linked-identities.graphql

@@ -1,4 +1,6 @@
 # For GitHub Enterprise Cloud enterprises that have SAML configured at the enterprise level, this query will print a list of the first 100 SAML identities (specifically the `nameId` attribute value) in the enterprise and the linked GitHub username (if the SAML identity is linked).
+# An email address often gets used for the SAML `nameId` value, but this is not always the case. 
+# If the Identity Provider has sent an `emails` attribute/value in a previous SAML response for enterprise member(s), it also possible to add the `emails` attribute in the `samlIdentity` section right below `nameID` and query for this SAML identity attribute value as well. 
 
 query listSSOUserIdentities ($enterpriseName:String!) {
   enterprise(slug: $enterpriseName) {