Update README.md

Add asciinema of GCD

Author: walpurr

README.md

@@ -3,3 +3,4 @@
 [![Maintainability](https://api.codeclimate.com/v1/badges/607d449d4c93834a7de5/maintainability)](https://codeclimate.com/github/prvmjsky/java-project-61/maintainability)
 [![asciicast](https://asciinema.org/a/auuc7OVnZsoYAoikI90O8XTq4.svg)](https://asciinema.org/a/auuc7OVnZsoYAoikI90O8XTq4)
 [![asciicast](https://asciinema.org/a/NoKAZHowJ0Pz2XxsNRRh3x2ab.svg)](https://asciinema.org/a/NoKAZHowJ0Pz2XxsNRRh3x2ab)
+[![asciicast](https://asciinema.org/a/GdqFiJxYf83hcrcE8gryAMdOm.svg)](https://asciinema.org/a/GdqFiJxYf83hcrcE8gryAMdOm)