🚑️ Replace @octokit/core with @actions/github (#114)

- 🚑️ Replace `@octokit/core` with `@actions/github`
- 📦️ Update `dist/`
- 🔧 Update to Node 20
- 🐛 Remove `opts.auth`
    Parameters `token` and `opts.auth` may not both be specified
- 📦️ Update `dist/`

Author: stoe

action.yml

@@ -20,7 +20,7 @@ inputs:
     required: false
 
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/index.js'
 
 branding: