Update readme

corb2/README.md

@@ -4,4 +4,4 @@ Download corb2 from https://github.com/marklogic-community/corb2/releases
 Download xcc from https://repo1.maven.org/maven2/com/marklogic/marklogic-xcc/11.1.0/ or https://developer.marklogic.com/products/xcc-2/ (I used maven)
 (both into this directory)
 
-`corb show` (bad name, fix) will run the code, `show.log` will show what it writes to the identifiers
+`corb migrate-ncn` will run the code, `migrate-ncn.log` will show what it writes to the identifiers