Merge pull request #390 from odsantos/update-en-sets-ranges

Update "Sets and ranges" article

Author: odsantos

9-regular-expressions/08-regexp-character-sets-and-ranges/article.md

@@ -88,7 +88,7 @@ alert( str.match(regexp) ); // H,i,你,好,1,2
 Of course, we can edit this pattern: add Unicode properties or remove them. Unicode properties are covered in more details in the article <info:regexp-unicode>.
 
 ```warn header="Unicode properties aren't supported in IE"
-Unicode properties `pattern:p{…}` are not implemented in IE. If we really need them, we can use library [XRegExp](http://xregexp.com/).
+Unicode properties `pattern:p{…}` are not implemented in IE. If we really need them, we can use library [XRegExp](https://xregexp.com/).
 
 Or just use ranges of characters in a language that interests us, e.g.  `pattern:[а-я]` for Cyrillic letters.
 ```