Update README.md

Author: ikkisoft

README.md

@@ -1,5 +1,7 @@
 # Regexploit
 
+![regexploit_logo](https://user-images.githubusercontent.com/6027823/110626827-7f46db80-81a1-11eb-9a3d-3e3376bd9a4f.png)
+
 Find regexes which are vulnerable to Regular Expression Denial of Service (ReDoS).
 
 Many default regular expression parsers have unbounded worst-case complexity. Regex matching may be quick when presented with a matching input string. However, certain non-matching input strings can make the regular expression matcher go into crazy backtracking loops and take ages to process. This can cause denial of service, as the CPU will be stuck trying to match the regex.