[types] Fix __str__ method of Language enum

Author: DJAntivenom

sebs/types.py

@@ -34,6 +34,9 @@ def deserialize(val: str) -> Language:
                 return member
         raise Exception(f"Unknown language type {val}")
 
+    def __str__(self) -> str:
+        return self.value
+
 
 class NoSQLStorage(str, Enum):
     AWS_DYNAMODB = "aws-dynamodb"