fix: update SPM package to be valid.

Author: finestructure

Package.swift

@@ -9,7 +9,7 @@ let package = Package(
         // Products define the executables and libraries a package produces, making them visible to other packages.
         .library(
             name: "BLAKE3",
-            targets: ["blake3-swift"]),
+            targets: ["BLAKE3"]),
     ],
     targets: [
         .target(