Merge branch 'fix-prerequesite-package-name' into 'master'

DOC: Fix the name of the prerequsite package required to build iMSTK in Unix

See merge request iMSTK/iMSTK!639

README.md

@@ -52,7 +52,7 @@ Designed more specifically for developers, the issue tracker allows developers t
 ##### On Linux:
 
 ```bash
-sudo apt-get install build-essentials libgl1-mesa-dev libxt-dev libusb-1.0-0-dev
+sudo apt-get install build-essential libgl1-mesa-dev libxt-dev libusb-1.0-0-dev
 ```
 
 ## Getting started with iMSTK