Fix cors settings again

The previous change made 2 cors rules, not one.

Change-Id: I53295711f1bd0077f34a28d2665a60f630f58de8

roles/upload-logs-gcs/library/zuul_google_storage_upload.py

diff --git a/roles/upload-logs-gcs/library/zuul_google_storage_upload.py b/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
index f658113..e5a2143 100755
--- a/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
+++ b/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
@@ -627,10 +627,10 @@
         self.prefix = prefix or ''
 
         self.bucket = client.bucket(container)
-        cors = [
-            {'method': ['GET', 'HEAD']},
-            {'origin': ['*']}
-        ]
+        cors = [{
+            'method': ['GET', 'HEAD'],
+            'origin': ['*']
+        }]
         self.bucket.cors = cors
         self.bucket.website = {"mainPageSuffix": "index.html"}
         self.bucket.update()