Turn "Service worker improvements" into a regular article

[mikehoffms]

Rendered articles for review:

• Service worker improvements
  • /devtools/service-workers/index.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/devtools/service-workers/index?branch=pr-en-us-3630
  • External preview: https://github.com/MicrosoftDocs/edge-developer/blob/user/mikehoffms/serv-work/microsoft-edge/devtools/service-workers/index.md
  • Before/live: https://learn.microsoft.com/microsoft-edge/devtools/service-workers/
  • Change from "what's new" wording to regular description.
  • Ensure that all of the improvements that are described in this article are already covered in other, regular, articles.
    • If not, update those other articles to cover the improvements.
  • Ideally, this "What's New"-style article should eventually get deleted.

AB#59451024

[learn-build-service-prod]

Learn Build status updates of commit 2f80b97:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/devtools/service-workers/index.md	✅Succeeded	View

For more details, please refer to the build report.