small additions to readme

README.md

@@ -3,7 +3,7 @@
 [![Tests](https://github.com/dfki-ric/deformable_gym/actions/workflows/test.yaml/badge.svg)](https://github.com/dfki-ric/deformable_gym/actions/workflows/test.yaml)
 
 This repository contains a collection of RL gym environments built with PyBullet. In these environments, the agent 
-needs to learn to grasp deformable object such as shoe insoles or pillows.
+needs to learn to grasp deformable object such as shoe insoles or pillows from sparse reward signals.
 
 <p align="center">
   <img src="doc/source/_static/defgym.svg"/>
@@ -109,7 +109,7 @@ The recommended workflow to add a new feature, add documentation, or fix a bug i
 
 Note that there is a checklist for new features.
 
-It is forbidden to directly push to the main branch. Each new version has its own development branch from which a pull request will be opened to the main branch. Only the maintainer of the software is allowed to merge a development branch to the main branch.
+It is forbidden to directly push to the main branch. Each new version has its own development branch from which a pull request will be opened to the main branch. Only the maintainers of the software are allowed to merge a development branch to the main branch.
 
 ## Referencing