DOCSP-48323: Causal consistency feedback

(cherry picked from commit 3061d10)

Author: mcmorisi

source/crud/transactions.txt

@@ -57,6 +57,10 @@ operations. For example, if you perform a series of operations where
 one operation logically depends on the result of another, any subsequent
 reads reflect the dependent relationship.
 
+.. note::
+   
+   A client session enables causal consistency even if it does not perform a transaction.
+
 The following table describes the guarantees that causally
 consistent sessions provide:
 
@@ -90,7 +94,7 @@ consistent sessions provide:
        ``delete_one()`` to delete the retrieved document, the driver runs the find
        operation first.
 
-In a causally consistent session, MongoDB ensures a causal relationship between the
+In a causally consistent session, MongoDB guarantees causal consistency between only the
 following operations:
 
 - Read operations that have a ``majority`` read concern