[CI] Format code

Author: github-actions[bot]

exercises/practice/line-up/.meta/proof.ci.js

@@ -22,4 +22,4 @@ const getSuffix = (number) => {
 };
 
 export const format = (name, number) =>
-  `${name}, you are the ${number}${getSuffix(number)} customer we serve today. Thank you!`;
+  `${name}, you are the ${number}${getSuffix(number)} customer we serve today. Thank you!`;