[editing-explainer] Correct a spelling mistake (#46)

I suspect that "descision" is incorrect.
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/editing-explainer/pull/46

-- Commit Summary --

  * Correct a spelling mistake

-- File Changes --

    M tf-charter.html (2)

-- Patch Links --

https://github.com/w3c/editing-explainer/pull/46.patch
https://github.com/w3c/editing-explainer/pull/46.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/editing-explainer/pull/46