Documentation

ISO-8859-4 is NOT for Baltic languages. (see Wikipedia and spec preview)

Also, use new English spelling of Belarusian. (see Wikipedia and Google Ngram Viewer)

Linked PRs

• gh-123441: docs: fix codecs table data #123439
• gh-123441: Update Belorussian spelling #132409
• [3.13] gh-123441: Update Belorussian spelling (GH-132409) #132432
• gh-123441: Correct the supported languages of the iso-8859-4 codec #137034