Update Nostr SDK Swift bindings to version 0.12.0

Author: github-actions

Package.swift

@@ -14,7 +14,7 @@ let package = Package(
     ],
     dependencies: [],
     targets: [
-        .binaryTarget(name: "nostr_sdkFFI", url: "https://github.com/rust-nostr/nostr-sdk-swift/releases/download/0.11.1/nostr_sdkFFI.xcframework.zip", checksum: "ed416ac8cbf894dfbe833f9f0fb1f5c06e30b719e8bf9f8a8e3aae7a77ea8c59"),
+        .binaryTarget(name: "nostr_sdkFFI", url: "https://github.com/rust-nostr/nostr-sdk-swift/releases/download/0.12.0/nostr_sdkFFI.xcframework.zip", checksum: "e8378e07f963e867209ec55a4aed09614353f5027c5ad8fee5b04be12c00602e"),
         .target(name: "NostrSDK", dependencies: ["nostr_sdkFFI"]),
     ]
 )