build: rename _toc to toc (#170)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/ebeac31c-a4b0-40a0-8aaf-cbd1303779c1/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: googleapis/synthtool@99c93fe

packages/google-cloud-phishingprotection/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-phishing-protection.git",
-        "sha": "b0cc070d61a5a1095052a5b765ad25f54c93dad4"
+        "sha": "38194fc34b49df7ac6a7b6cb7d437bb459cf92d3"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "21f1470ecd01424dc91c70f1a7c798e4e87d1eec"
+        "sha": "99c93fe09f8c1dca09dfc0301c8668e3a70dd796"
       }
     }
   ],