Update README.md

Author: lgor360

README.md

@@ -2,3 +2,6 @@
 analog clock widget on PyGObject!
 
 ![pyclock](https://github.com/user-attachments/assets/da8d848c-3112-4cc7-adff-94faa2fd72bd)
+
+# how to install
+just "git clone" this repository (or download source code from release) to your home directory and install python3-gobject, libcairo2-dev (cairo)