[push-api] removed wrong curly bracket in example (#91)

just noticed this little error while playing with the example
You can merge this Pull Request by running:

  git pull https://github.com/paul-em/push-api patch-1

Or you can view, comment on it, or merge it online at:

  https://github.com/w3c/push-api/pull/91

-- Commit Summary --

  * removed wrong curly bracket in example

-- File Changes --

    M index.html (2)

-- Patch Links --

https://github.com/w3c/push-api/pull/91.patch
https://github.com/w3c/push-api/pull/91.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/push-api/pull/91