bump swiftnio version

Author: johnnzhou

Package.swift

@@ -13,7 +13,7 @@ let package = Package(
         .library(name: "WebSocketKit", targets: ["WebSocketKit"])
     ],
     dependencies: [
-        .package(url: "https://github.com/johnnzhou/swift-nio.git", branch: "main"),
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.73.0"),
         .package(url: "https://github.com/apple/swift-nio-extras.git", from: "1.16.0"),
         .package(url: "https://github.com/apple/swift-nio-ssl.git", from: "2.24.0"),
         .package(url: "https://github.com/apple/swift-nio-transport-services.git", from: "1.16.0"),