add status badge

Author: altwazar

README.md

@@ -1,3 +1,5 @@
+[![say-hello](https://github.com/altwazar/hexlet-git/actions/workflows/say-hello.yml/badge.svg)](https://github.com/altwazar/hexlet-git/actions/workflows/say-hello.yml)
+
 Hello, Hexlet! How are you?
 No code No pain
 experiment with amend