Related to: [#25943](https://github.com/fleetdm/fleet/issues/25943)
Changes:
- Updated filenames of images in the website/assets/images/articles/
folder to match website naming conventions
- Updated links to images in articles.
Changes:
- Replaced the double curly brackets in the Github action examples to
prevent the Fleet website from interpreting those examples as [Vue
templates](https://vuejs.org/guide/essentials/template-syntax.html#text-interpolation)
(Which causes Javascript errors and prevents the page from rendering)
- Updated the indentation of images in ordered lists and added newlines
to keep the formatting consistent.
