update package description

Author: rohanpsingh

setup.py

@@ -15,8 +15,8 @@
     author='Rohan P. Singh',
     author_email='rohan565singh@gmail.com',
     url='https://github.com/rohanpsingh/mujoco-python-viewer',
-    description='Simple viewer for MuJoCo Python',
-    long_description='Simple viewer for MuJoCo Python',
+    description='Interactive renderer for MuJoCo Python',
+    long_description='Interactive renderer for MuJoCo Python',
     install_requires=INSTALL_REQUIRES,
     packages=find_packages(),
     python_requires='>=3.6',