[CI] Format code

Author: github-actions[bot]

concepts/template-strings/introduction.md

@@ -42,7 +42,7 @@ lines`;
 If you want to represent a newline inside a regular string instead of using a template string (ie. not using backticks), you can use the newline escape sequence `\n`:
 
 ```javascript
-"This is an example of using the newline escape sequence!\nWithout backticks"
+'This is an example of using the newline escape sequence!\nWithout backticks';
 
 /* => This is an example of using the newline escape sequence!
       Without backticks