change warnings to important

Author: mongoKart

source/fundamentals/transactions.txt

@@ -103,7 +103,7 @@ tabs to learn about the methods to manage your transaction:
                   learn more about this method, see the :manual:`withTransaction() page
                   </reference/method/Session.withTransaction/>` in the Server manual.
 
-                .. warning:: Handling Exceptions
+                .. important:: Handling Exceptions
 
                    When catching exceptions within the callback function used by
                    ``WithTransaction()``, you  **must** rethrow the exception before
@@ -162,7 +162,7 @@ tabs to learn about the methods to manage your transaction:
                   learn more about this method, see the :manual:`withTransaction() page
                   </reference/method/Session.withTransaction/>` in the Server manual.
 
-                .. warning:: Handling Exceptions
+                .. important:: Handling Exceptions
 
                    When catching exceptions within the callback function used by
                    ``WithTransactionAsync()``, you  **must** rethrow the exception