Remove short description from the top of README

Author: ArtyomVancyan

README.md

@@ -1,7 +1,5 @@
 # Django Mermaid
 
-Django template tag for rendering mermaid diagrams.
-
 [![PyPI](https://img.shields.io/pypi/v/django-mermaid.svg)](https://pypi.org/project/django-mermaid/)
 [![License](https://img.shields.io/pypi/l/django-mermaid.svg)](https://github.com/ArtyomVancyan/django-mermaid/blob/master/LICENSE)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://makeapullrequest.com)