build: run docs regen in synth.py (#1059)

diff --git a/synth.metadata b/synth.metadata
index 5f24424..bb1b76e 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -3,15 +3,15 @@
     {
       "git": {
         "name": ".",
-        "remote": "https://github.com/googleapis/google-api-python-client.git",
-        "sha": "510d17a52e0d500fd1a68c554a7d3dcbfdc1a5d6"
+        "remote": "git@github.com:busunkim96/google-api-python-client",
+        "sha": "d561a925389ff38839c98391dc4f5b52dc3db814"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "ffe10407ee2f261c799fb0d01bf32a8abc67ed1e"
+        "sha": "6542bd723403513626f61642fc02ddca528409aa"
       }
     }
   ]