Fix image_version workflow trigger name

[rhysd]

Why:

Closes: #41266

What's being changed (if available, include any code snippets, screenshots, or gifs):

Fixed the trigger name. image_version is correct.

https://github.com/actions/runner/blob/b3a60e6b0630a15b2daa549429b9ae2cf19f4400/src/Sdk/WorkflowParser/workflow-v1.0.json#L322

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
actions/reference/workflows-and-actions/events-that-trigger-workflows.md	fpt ghec ghes@ 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.18 3.17 3.16 3.15 3.14

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[Copilot]

Pull Request Overview

This PR fixes an incorrect workflow trigger name in the GitHub Actions documentation. The heading was incorrectly named image_version_ready without backticks, when it should be `image_version` to match both the actual event name used in workflow YAML and the formatting convention used for all other event headings in the document.

Key Changes

• Corrected the event name from image_version_ready to image_version to match the workflow syntax shown in the code example
• Added backticks around the event name to follow the established formatting pattern used for all other event headings in the document

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.