chore: regenerate common templates (#158)

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Source-Link: googleapis/synthtool@c6706ee
Source-Link: googleapis/synthtool@b33b0e2
Source-Link: googleapis/synthtool@898b38a

Author: yoshi-automation

packages/google-monitoring-dashboard/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-monitoring-dashboards.git",
-        "sha": "87b8645d220c9af042ef8022e36c6e3e39ca4444"
+        "sha": "fbaf19a23d6fdf9e26389bf11e6ef6b754b29673"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "57c23fa5705499a4181095ced81f0ee0933b64f6"
+        "sha": "c6706ee5d693e9ae5967614170732646590d8374"
       }
     }
   ],