tmp: pin Automattic-Tracks-iOS to source-map debug-images branch

TEMPORARY — do not merge. Pins Automattic-Tracks-iOS to the branch that adds
source-map debug images to `JSException` (PR #373), and re-pins GutenbergKit to
the pr-build/554 snapshot carrying the Debug ID work, so a prototype build can
verify end-to-end symbolication. Revert both pins to released versions before
merging.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: dcalhoun

Modules/Package.resolved

@@ -35,7 +35,10 @@ let package = Package(
         .package(url: "https://github.com/AliSoftware/OHHTTPStubs", from: "9.1.0"),
         .package(url: "https://github.com/apple/swift-collections", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.5.2"),
-        .package(url: "https://github.com/Automattic/Automattic-Tracks-iOS", from: "4.3.1"),
+        // TEMPORARY: pin to the branch adding source-map debug images to
+        // JSException, to verify GutenbergKit Sentry symbolication. Revert to
+        // `from: "4.3.1"` (or the released version) before merging.
+        .package(url: "https://github.com/Automattic/Automattic-Tracks-iOS", branch: "add/js-exception-sourcemap-debug-ids"),
         .package(url: "https://github.com/Automattic/AutomatticAbout-swift", from: "1.1.5"),
         .package(url: "https://github.com/Automattic/Gravatar-SDK-iOS", from: "3.4.0"),
         .package(url: "https://github.com/Automattic/Gridicons-iOS", branch: "develop"),