[w3c/payment-request] Editorial: Typo fix related to ISO 3166-2 (#941)

closes #940


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

  https://github.com/w3c/payment-request/pull/941

-- Commit Summary --

  * typo fix per issue 940

-- File Changes --

    M index.html (2)

-- Patch Links --

https://github.com/w3c/payment-request/pull/941.patch
https://github.com/w3c/payment-request/pull/941.diff

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https://github.com/w3c/payment-request/pull/941