Default retry-on-snapshot-warnings to false

Keeping this true by default means wasting actions minutes for
the vast majority of DR users

scripts/create_summary.ts

@@ -31,7 +31,7 @@ const defaultConfig: ConfigurationOptions = {
     'pkg:pip/pycrypto@2.6.1'
   ],
   comment_summary_in_pr: true,
-  retry_on_snapshot_warnings: true,
+  retry_on_snapshot_warnings: false,
   retry_on_snapshot_warnings_timeout: 120
 }