Update README.md

Author: madhunikitac

README.md

@@ -24,7 +24,7 @@ For an optimal learning experience, we recommend the following hardware configur
 ### Software requirements
 You must also install in advance the following software:
 * Any of the following operating systems: 
-  * Windows 7 SP1 32/64-bit, 
+  * Windows 7 SP1 32/64-bit
   * Windows 8.1 32/64-bit or Windows 10 32/64-bit
   * Ubuntu 14.04 or later
   * macOS Sierra or later