chore(node): fix kokoro build path for cloud-rad (#197)

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Source-Link: googleapis/synthtool@89d431f

packages/google-cloud-recaptchaenterprise/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-recaptcha-enterprise.git",
-        "sha": "b3148afa6977364fe9d5cddf5c8c48bc22d2a8cd"
+        "sha": "e808af3bf9640f95b51525aa6c43aa7dd66e68e0"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "3a00b7fea8c4c83eaff8eb207f530a2e3e8e1de3"
+        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
       }
     }
   ],