chore(node): fix kokoro build path for cloud-rad (#96)

Source-Author: F. Hinkelmann <franziska.hinkelmann@gmail.com>
Source-Date: Wed Jul 29 00:28:42 2020 -0400
Source-Repo: googleapis/synthtool
Source-Sha: 89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa
Source-Link: googleapis/synthtool@89d431f

Author: yoshi-automation

handwritten/bigquery-storage/.kokoro/release/docs-devsite.cfg

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-bigquery-storage.git",
-        "sha": "727484c227636b675083ec236a8f3aebfefe6324"
+        "sha": "4e992afd67dc4c34817e73884a63b417638452d8"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "3a00b7fea8c4c83eaff8eb207f530a2e3e8e1de3"
+        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
       }
     }
   ],