Jira Servicedesk Upgrade in Azure

[Jobin Jose]

How do I upgarde Jira Servicedesk to a specific version using Zero Downtime approach. The method described here says it will pickup the latest available version but how do I do upgarde to a specific version using this method.
https://confluence.atlassian.com/enterprise/administering-jira-software-data-center-on-azure-969535567.html

I have my cluster deployed in Azure using the ARM template.It picksup Servicedesk 4.5.9 whereas I see the latest version is 4.14.x I tried to follow the method described here but again it is installing the same version.
I tried to manually edit the servicedsk.version in the Shared home to 4.14.1 but that didn't work. Can someone please help me to get thsi fixed?