[WebPlatformWG] Simplify text for introduction course (#14)

The current text does not concisely convey what the course is about.
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/WebPlatformWG/pull/14

-- Commit Summary --

  * Simplify text for introduction course

-- File Changes --

    M Newbie.md (3)

-- Patch Links --

https://github.com/w3c/WebPlatformWG/pull/14.patch
https://github.com/w3c/WebPlatformWG/pull/14.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/WebPlatformWG/pull/14