Update runner to node16

Node 12 is out of support and is starting to be deprecated by GitHub Actions: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

Author: liskin

action.yaml

@@ -19,7 +19,7 @@ inputs:
       Command to run.
     required: true
 runs:
-  using: node12
+  using: node16
   main: dist/index.js
 branding:
   icon: check-circle