readme update

Author: MeritonAliu

README.md

@@ -1,13 +1,17 @@
 # blockchain-py
+
 my own blockchain with programm
 
-### Description
+## Description
+
 - does not work because of the transaction stuff.
 
-### Installing & Usage
+## Installing & Usage
+
 1. cd "your_path"
-2. git clone https://github.com/MeritonAliu/blockchain.git
+2. git clone <https://github.com/MeritonAliu/blockchain-py>
 3. run the blockchain.py file with python
-   
-### Authors
+
+## Authors
+
 [@MeritonAliu](https://github.com/MeritonAliu)