Fix next version

Author: hynek

src/attr/_next_gen.py

@@ -180,7 +180,7 @@ def field(
     Identical to `attr.ib`, except keyword-only and with some arguments
     removed.
 
-    .. versionadded:: 22.3.0
+    .. versionadded:: 23.1.0
        The *type* parameter has been re-added; mostly for
        {func}`attrs.make_class`. Please note that type checkers ignore this
        metadata.