update readme

README.md

@@ -4,7 +4,7 @@
 
 - CpG islands defined using [EMBOSS newcpgreport](https://www.bioinformatics.nl/cgi-bin/emboss/help/newcpgreport)
 - CpG islands defined using [UCSC cpg_lh](http://genome.ucsc.edu/cgi-bin/hgTrackUi?hgsid=1136815349_vADDCkvwSdu3g8CimOykIvSHZHar&db=rn3&c=chr5&g=cpgIsland)
-- window CpG Observed/Expected bases on R script
+- window C, G, CpG counts and CpG Observed/Expected
 
 ## Install CGI flow and build singularity image