First three parts of version # must match, in "Use WebDriver to automate Microsoft Edge"

[mikehoffms]

Rendered article section for review:

• Use WebDriver to automate Microsoft Edge > Download Microsoft Edge WebDriver
  • https://review.learn.microsoft.com/microsoft-edge/webdriver-chromium/?branch=pr-en-us-3281#download-microsoft-edge-webdriver
  • Before/Live
  • Specified that the first three parts of the four-part version number must match, between Edge & WebDriver.
  • Fresh pngs.

This PR fixes #3270.

[learn-build-service-prod]

Learn Build status updates of commit 8c421cc:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/webdriver-chromium/index-images/microsoft-edge-driver-install.png	✅Succeeded	View
microsoft-edge/webdriver-chromium/index-images/microsoft-edge-version.png	✅Succeeded	View
microsoft-edge/webdriver-chromium/index.md	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel