Update action.yml to node16

Author: joshcai

action.yml

@@ -21,5 +21,5 @@ inputs:
     description: 'The folder to save the synced files in (relative to the top level of your repo)'
     required: false
 runs:
-  using: 'node12'
+  using: 'node16'
   main: 'index.js'