add-entry: fix CLI usage

When I converted this script so that it could be used as a module in an
`actions/github-script` step in automation, I forgot to ensure that it
still works as a command-line script. And this bug crept in...

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

add-entry.js

@@ -79,7 +79,7 @@ const main = async (...args) => {
 
 module.exports = main
 
-if (require.main === module) main(process.argv.slice(2)).catch(e => {
+if (require.main === module) main(...process.argv.slice(2)).catch(e => {
   console.error(e)
   process.exit(1)
 })