Update README.md

Author: ismail0234

README.md

@@ -22,3 +22,7 @@ Eğer kendi dilinizi göremiyor ve eklenmesini istiyorsanız ozaman [buradan](ht
 #### İngilizce(English)
 
 If you cannot see your own language and want it to be added, then you can [here](https://github.com/ismail0234/php-performance-benchmark/blob/master/application/language/) create the folder with the abbreviation code for your language and translate the languages in the tr or en folder.
+
+### Demo Ekran Görüntüsü(Demo Screenshoot)
+
+![Ekran Görüntüsü](https://raw.githubusercontent.com/ismail0234/php-performance-benchmark/master/documents/images/screencapture-2.png?token=AE6APBJFOI2ILR7AIC6MJS25425JU)