chore(deps): update dependency apple/swift-docc-plugin to from: "1.4.4"

Author: renovate[bot]

Package.swift

@@ -19,7 +19,7 @@ let package = Package(
         .package(url: "https://github.com/michaelhenry/CombineCocoa", from: "1.0.1"),
         .package(url: "https://github.com/michaelhenry/Prettier.swift", from: "1.1.1"),
         .package(url: "https://github.com/raspu/Highlightr", from: "2.1.2"),
-        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.3.0"),
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.4.4"),
     ],
     targets: [
         .target(