updated readme to fix another typo

Author: swill

README.md

@@ -38,6 +38,6 @@ export OLD_RELEASE=4.9.0
 export NEW_RELEASE=4.10.0
 cp tools/apidoc/target/commands.xml $COMMANDS/${NEW_RELEASE}_commands.xml
 mkdir $COMMANDS/diff-${OLD_RELEASE//.}-${NEW_RELEASE//.}
-java -cp $HOME/.m2/repository/com/thoughtworks/xstream/xstream/1.4.9/xstream-1.4.9.jar:$HOME/.m2/repository/com/google/code/gson/gson/1.7.2/gson-1.7.2.jar:server/target/classes com.cloud.api.doc.ApiXmlDocReader -old $COMMANDS/$OLD_RELEASE_commands.xml -new $COMMANDS/$NEW_RELEASE_commands.xml -d $COMMANDS/diff-${OLD_RELEASE//.}-${NEW_RELEASE//.}
+java -cp $HOME/.m2/repository/com/thoughtworks/xstream/xstream/1.4.9/xstream-1.4.9.jar:$HOME/.m2/repository/com/google/code/gson/gson/1.7.2/gson-1.7.2.jar:server/target/classes com.cloud.api.doc.ApiXmlDocReader -old $COMMANDS/${OLD_RELEASE}_commands.xml -new $COMMANDS/${NEW_RELEASE}_commands.xml -d $COMMANDS/diff-${OLD_RELEASE//.}-${NEW_RELEASE//.}
 ```