chore: update package dependencies (#26)

Author: github-actions[bot]

Package.resolved

@@ -27,7 +27,7 @@ let package = Package(
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         .package(url: "https://github.com/apple/swift-numerics", from: "1.0.0"),
-        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.1.0"),
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.4.3"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.