Merge pull request #9003 from SwiftPackageIndex/spi-auto-9002

Add ImmutableData

Author: finestructure

packages.json

@@ -7148,6 +7148,7 @@
   "https://github.com/Swift-CowBox/Swift-CowBox.git",
   "https://github.com/swift-extras/swift-extras-base64.git",
   "https://github.com/swift-extras/swift-extras-json.git",
+  "https://github.com/Swift-ImmutableData/ImmutableData.git",
   "https://github.com/swift-libp2p/swift-bases.git",
   "https://github.com/swift-libp2p/swift-cid.git",
   "https://github.com/swift-libp2p/swift-multibase.git",