Update README.md

Author: sujitmandal

README.md

@@ -3,9 +3,9 @@ Automatically  Send Gmail with SMTP Server.
 
 ## Package Installation : 
 ```
-pip install py-gmail
+pip install python-gmail
 ```
-[Package Link](https://pypi.org/project/py-gmail/)
+[Package Link](https://pypi.org/project/python-gmail/)
 ## py-gamil :
 Inorder to send mail form gmail using SMTP Server, first you need to enable "Two-Step Verification" on the sender mail id.