[webcomponents] Fix participates typo (#296)

You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/webcomponents/pull/296

-- Commit Summary --

  * Fix participates typo

-- File Changes --

    M spec/shadow/index.html (2)

-- Patch Links --

https://github.com/w3c/webcomponents/pull/296.patch
https://github.com/w3c/webcomponents/pull/296.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/pull/296