Fix zh-classical wikicode for lzh language

[albertvillanova]

Currently, the result table has "lzh" as wikicode, instead of "zh-classical".

See:

• https://commons.wikimedia.org/wiki/Data:Wikipedia_statistics/data.tab
• https://meta.wikimedia.org/wiki/Template:List_of_wikis_by_project

[greencardamom]

Thanks for the diff.