Question - Violation Comments to GitHub

Hey! I am trying to dynamically post back to the PR on GitHub, which I have succeeded at. However, the variable for `pullRequestId` doesn't appear to work when I try and use the variable defined on the docs, I get an exception error:

`java.lang.NumberFormatException: For input string: "${ghprbPullId}"`

Are you able to point me in the right direction?