update m2met2 doc & baseline (#675)

yhliang

2023-06-28 3cc7403b687e4c9832885df3caaea181894a512f

 funasr/bin/train.py

@@ -301,7 +301,7 @@
        "--freeze_param",
        type=str,
        default=[],
        nargs="*",
        action="append",
        help="Freeze parameters",
    )