fix parameter name (#111)

Co-authored-by: Stephen Celis <stephen@stephencelis.com>

Author: zunda-pixel

Package@swift-6.0.swift

@@ -41,7 +41,7 @@ let package = Package(
       ]
     ),
   ],
-  swiftLanguageVersions: [.v6]
+  swiftLanguageModes: [.v6]
 )
 
 #if os(Linux) || os(Windows)