chore(safebrowsing): update the api

googleapiclient/discovery_cache/documents/safebrowsing.v4.json

diff --git a/googleapiclient/discovery_cache/documents/safebrowsing.v4.json b/googleapiclient/discovery_cache/documents/safebrowsing.v4.json
index e178bf1..a6b377c 100644
--- a/googleapiclient/discovery_cache/documents/safebrowsing.v4.json
+++ b/googleapiclient/discovery_cache/documents/safebrowsing.v4.json
@@ -261,7 +261,7 @@
       }
     }
   },
-  "revision": "20210519",
+  "revision": "20210520",
   "rootUrl": "https://safebrowsing.googleapis.com/",
   "schemas": {
     "GoogleProtobufEmpty": {