Automator: update proxy@master in istio/istio@master (istio#57829)

Author: istio-testing

istio.deps

@@ -4,7 +4,7 @@
     "name": "PROXY_REPO_SHA",
     "repoName": "proxy",
     "file": "",
-    "lastStableSHA": "b7807b5603c40535d4d7e5700c36dbfe57543238"
+    "lastStableSHA": "9842d091377438c107e7a0a8f3e65eac18d01539"
   },
   {
     "_comment": "",