Moneropedia ruby script tweak for 5 letter country code (ie. pt-br)

Merged el00ruobuob requested to merge el00ruobuob/monero-site:moneropedia_country-code into master

This is needed for !972 (merged) to work correctly.

This update let us work with either two letter (en, it, fr, es), or five letter (pt-br, fr-ca) country codes.

This should be merged along with !972 (merged).

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