Update args to validation_seed and validation_split

train_network.py

@@ -1099,12 +1099,17 @@ def setup_parser() -> argparse.ArgumentParser:
         action="store_true",
         help="do not use fp16/bf16 VAE in mixed precision (use float VAE) / mixed precisionでも fp16/bf16 VAEを使わずfloat VAEを使う",
     )
-
     parser.add_argument(
-        "--validation_ratio",
+        "--validation_seed",
+        type=int,
+        default=None,
+        help="Validation seed"
+    )
+    parser.add_argument(
+        "--validation_split",
         type=float,
         default=0.0,
-        help="Ratio for validation images out of the training dataset"
+        help="Split for validation images out of the training dataset"
     )
 
     return parser