fix for soundness check

Author: heckj

Package.swift

@@ -27,7 +27,7 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-crypto.git", "1.0.0"..<"4.0.0"),
         .package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
         .package(url: "https://github.com/apple/swift-http-types.git", from: "1.2.0"),
-        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [
         .target(