Update docs

Author: FlorentinD

doc/modules/ROOT/pages/tutorials/gds-sessions.adoc

@@ -83,7 +83,7 @@ delete the session ourselves.
 
 [source, python, role=no-test]
 ----
-from graphdatascience.session import AlgorithmCategory, DbmsConnectionInfo
+from graphdatascience.session import AlgorithmCategory
 
 # Estimate the memory needed for the GDS session
 memory = sessions.estimate(
@@ -97,6 +97,8 @@ memory = sessions.estimate(
 ----
 from datetime import timedelta
 
+from graphdatascience.session import DbmsConnectionInfo
+
 # Identify the AuraDB instance
 db_connection = DbmsConnectionInfo(
     uri=os.environ["AURA_DB_ADDRESS"], username=os.environ["AURA_DB_USER"], password=os.environ["AURA_DB_PW"]