DOCSS-1931 fix erroring syntax for event parameter

[nanophate]

Description

using the syntax in document caused pipeline to error. updating to make sure the build can run.

Reasons

copying the syntax from document experienced following error

Content Checklist

Make sure the pipeline run:
https://app.circleci.com/pipelines/github/nanophate-cci/check-draft-pr

Please take a moment to check through the following items when submitting your PR (this is just a guide so will not be relevant for all PRs):

• Break up walls of text by adding paragraph breaks.
• Consider if the content could benefit from more structure, such as lists or tables, to make it easier to consume.
• Keep the title between 20 and 70 characters.
• Consider whether the content would benefit from more subsections (h2-h6 headings) to make it easier to consume.
• Check all headings h1-h6 are in sentence case (only first letter is capitalized).
• Include relevant backlinks to other CircleCI docs/pages.