fix(curriculum) replace head content regex (freeCodeCamp#55922)

Author: lasjorg

curriculum/challenges/english/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/614385513d91ae5c251c2052.md

@@ -22,7 +22,7 @@ assert.strictEqual(document.querySelectorAll('link')?.length, 3);
 Your `link` elements should be inside your `head` element.
 
 ```js
-const headContentRegex = /(?<=<head\s*>)(?:.|\s*)*?(?=<\/head\s*>)/;
+const headContentRegex = /(?<=<head\s*>)[\S|\s]*(?=<\/head\s*>)/;
 const headElementContent = code.match(headContentRegex);
 
 const headElement = document.createElement("head");
@@ -76,7 +76,7 @@ assert.strictEqual(title?.length, 1);
 Your `title` element should be inside your `head` element.
 
 ```js
-const headContentRegex = /(?<=<head\s*>)(?:.|\s*)*?(?=<\/head\s*>)/;
+const headContentRegex = /(?<=<head\s*>)[\S|\s]*(?=<\/head\s*>)/;
 const headElementContent = code.match(headContentRegex);
 
 const headElement = document.createElement("head");