Roll Fuchsia SDK from 28.20250625.5.1 to 28.20250628.3.1

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Cq-Include-Trybots: luci.dart.try:vm-fuchsia-release-x64-try;luci.dart.try:vm-fuchsia-release-arm64-try
Change-Id: I15285af15b1168a167640f6f4858d868eeb6e0e0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/437862
Commit-Queue: Zijie He <[email protected]>
Reviewed-by: Alexander Aprelev <[email protected]>
Reviewed-by: Alexander Markov <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -84,7 +84,7 @@ vars = {
   "download_reclient": True,
 
   # Update from https://chrome-infra-packages.appspot.com/p/fuchsia/sdk/core
-  "fuchsia_sdk_version": "version:28.20250625.5.1",
+  "fuchsia_sdk_version": "version:28.20250628.3.1",
   "download_fuchsia_deps": False,
 
   # Ninja, runs the build based on files generated by GN.