Update README.md

WES/README.md

 ## Introduction
 
-**Whole Exome ** data analysis - from fastq data to variants calling and annotation
+**Whole Exome** data analysis - from fastq data to variants calling and annotation
 As stated in supplementary methods we performed WES analysis relying mostly on the GATK best practices for WES analysis.
 
 Below the main steps performed and the relative running commands: