Update default runtime to node16

Node 12 has an end of life on April 30, 2022. This PR updates the default runtime to [node16](https://github.blog/changelog/2021-12-10-github-actions-github-hosted-runners-now-run-node-js-16-by-default/), rather then node12. This is supported on all Actions Runners v2.285.0 or later.
actions · Feb 7, 2022 · d2ed94b · d2ed94b
1 parent e3cbab9
commit d2ed94b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/action.yml b/action.yml
@@ -27,5 +27,5 @@ outputs:
   result:
     description: The return value of the script, stringified with `JSON.stringify`
 runs:
-  using: node12
+  using: node16
   main: dist/index.js