Update SwiftOpenAPIRuntime library dependency

Author: kstefanou52

Package.swift

@@ -60,7 +60,7 @@ let package = Package(
         // Tests-only: Runtime library linked by generated code, and also
         // helps keep the runtime library new enough to work with the generated
         // code.
-        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.3.2"),
+        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.4.0"),
         .package(url: "https://github.com/apple/swift-http-types", from: "1.0.2"),
 
         // Build and preview docs