Increase Cloud CI timeout so integration tests can run (#1973)

DEV

Author: Kangyi Zhang

cloudbuild.yml

@@ -90,7 +90,7 @@ secrets:
 - kmsKeyName: projects/learnjs-174218/locations/global/keyRings/tfjs/cryptoKeys/enc
   secretEnv:
     BROWSERSTACK_KEY: CiQAkwyoIW0LcnxymzotLwaH4udVTQFBEN4AEA5CA+a3+yflL2ASPQAD8BdZnGARf78MhH5T9rQqyz9HNODwVjVIj64CTkFlUCGrP1B2HX9LXHWHLmtKutEGTeFFX9XhuBzNExA=
-timeout: 1800s
+timeout: 3600s
 logsBucket: 'gs://tfjs-build-logs'
 options:
   logStreamingOption: 'STREAM_ON'