Upped wrong Xmx2g value to Xmx4g in README to prevent Java OutOfMemor…

…yError in linux shell script example.

exomiser-cli/README.md

@@ -47,7 +47,7 @@ The following shell script should work-
 
     #run a test genomiser analysis
     cd exomiser-cli-${project.version}
-    java -Xms2g -Xmx2g -jar exomiser-cli-${project.version}.jar --analysis examples/test-analysis-exome.yml
+    java -Xms2g -Xmx4g -jar exomiser-cli-${project.version}.jar --analysis examples/test-analysis-exome.yml
 
 This script will download, verify and extract the exomiser files and then run the analysis contained in the file 'test-analysis-exome.yml' from the examples sub-directory. This contains a known pathogenic missense variant in the FGFR2 gene.