feat: allow 2GB session sizes

Author: RafalSkolasinski

graphdatascience/session/session_sizes.py

@@ -44,7 +44,7 @@ class SessionMemory(Enum):
     """
     Enumeration representing session main memory configurations.
     """
-
+    m_2GB = SessionMemoryValue("2GB")
     m_4GB = SessionMemoryValue("4GB")
     m_8GB = SessionMemoryValue("8GB")
     m_16GB = SessionMemoryValue("16GB")