[EN] Add the infl of template to variants

[BoboTiG]

• Wiktionary page: https://en.wiktionary.org/wiki/clinging

It uses the infl of (inflection of) model. I think that should be treated as a variant.

For example, the full model is {{infl of|en|cling||ing-form}}, and I would see cling being part of the variants for that word.

[BoboTiG]

The random daily word job failed today on such word: https://en.wiktionary.org/wiki/thirling

So I think I was correct: infl of should be used for variants.

[BoboTiG]

Again:

• Job: https://github.com/BoboTiG/ebook-reader-dict/actions/runs/7636182142/job/20802822471
• Word: misboxes