revert README

Removed 'Hello World' from Quick Start section.

Signed-off-by: cheese-cakee <farzanaman99@gmail.com>

Author: cheese-cakee

README.md

@@ -7,7 +7,7 @@
 A Python SDK for interacting with the Hedera Hashgraph platform.
 
 
-## Quick Start Hello World
+## Quick Start
 
 ### Installing from PyPI