Fix red build again (#10298)

tools/fuchsia/build_fuchsia_artifacts.py

@@ -161,7 +161,7 @@ def ProcessCIPDPakcage(upload, engine_version):
     stamp_file = open(stamp_file_path, 'w')
     stamp_file.write('https://chrome-infra-packages.appspot.com/p/flutter/fuchsia/+/git_revision:%s' % engine_version)
     stamp_file.close()
-    subprocess.check_call(['gsutil', 'cp', 'gs://flutter_infra/flutter/%s/' % engine_version, stamp_file_path])
+    subprocess.check_call(['gsutil', 'cp', 'gs://flutter_infra/flutter/%s/fuchsia.stamp' % engine_version, stamp_file_path])
 
 
 def GetRunnerTarget(runner_type, product, aot):