chore: update bucket for cloud-rad (#449)

Co-authored-by: gcf-merge-on-green[bot] <60162190+gcf-merge-on-green[bot]@users.noreply.github.com>

Source-Author: F. Hinkelmann <franziska.hinkelmann@gmail.com>
Source-Date: Wed Sep 30 14:13:57 2020 -0400
Source-Repo: googleapis/synthtool
Source-Sha: 079dcce498117f9570cebe6e6cff254b38ba3860
Source-Link: googleapis/synthtool@079dcce

packages/google-cloud-texttospeech/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-text-to-speech.git",
-        "sha": "d069082f8e5630a80e3b064525dd51f011f8c0dd"
+        "sha": "b2ec1f14ee51d572e2aa17012bf506a96acbd19e"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "fdd03c161003ab97657cc0218f25c82c89ddf4b6"
+        "sha": "079dcce498117f9570cebe6e6cff254b38ba3860"
       }
     }
   ],