Add support for 3 Finnish websites

[Eldemarkki]

Add support for Finnish cooking sites valio.fi, kotikokki.net and yhteishyva.fi

Sample urls:

• https://www.valio.fi/reseptit/suklaa-cookies/
• https://www.kotikokki.net/kumppanit/alfez/reseptit/nayta/866334/Harissalla%20marinoidut%20kanavartaat/
• https://yhteishyva.fi/reseptit/veriappelsiinipiiras/2tWwcxDpTfg8m1HBDMCXe9

[vercel[bot]]

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🔍 Inspect: https://vercel.com/jpbulman/only-the-recipe/5E53tjfxDrWKSutjbLpCxGJcbh7Y
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[jpbulman]

Thanks for contributing! This appears to be working, merging! :rocket: