Bump runtime to node20 from node16 (#114)

https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

Author: ostrowr

action.yml

@@ -74,5 +74,5 @@ branding:
   icon: message-circle
   color: purple
 runs:
-  using: "node16"
+  using: "node20"
   main: "dist/index.js"