Update article.md

Author: lex111

9-regular-expressions/03-regexp-unicode/article.md

@@ -34,7 +34,7 @@ Unlike strings, regular expressions have flag `pattern:u` that fixes such proble
 ## Unicode properties \p{...}
 
 ```warn header="Not supported in Firefox and Edge"
-Despite being a part of the standard since 2018, unicode proeprties are not supported in Firefox ([bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1361876)) and Edge ([bug](https://github.com/Microsoft/ChakraCore/issues/2969)).
+Despite being a part of the standard since 2018, unicode properties are not supported in Firefox ([bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1361876)) and Edge ([bug](https://github.com/Microsoft/ChakraCore/issues/2969)).
 
 There's [XRegExp](http://xregexp.com) library that provides "extended" regular expressions with cross-browser support for unicode properties.
 ```