chore(node): fix kokoro build path for cloud-rad (#504)

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Source-Link: googleapis/synthtool@89d431f

Author: yoshi-automation

handwritten/error-reporting/.kokoro/release/docs-devsite.cfg

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-error-reporting.git",
-        "sha": "7eec3fdbbaa8500efa82156171da0d1a928589e6"
+        "sha": "a2051503e6eac951f773f91a1d3ad253cf003552"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "3a00b7fea8c4c83eaff8eb207f530a2e3e8e1de3"
+        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
       }
     }
   ]