Update Pinyin input method that comes with virtual keyboard

There have been new simplified Chinese characters being added to Unicode from time to time. According to revision GB18030-2022 (https://en.wikipedia.org/wiki/GB_18030), 3 new characters are added:
龦：ピンイン(Cháng)：UNICODE(0x9FA6)
龧：ピンイン(Shǔ)：UNICODE(0x96A7)
龰：ピンイン(Zǒu)：UNICODE(0x9FB0)

Maybe we can update what comes with virtual keyboard, i.e. whatever related inside "qtvirtualkeyboard\src\plugins\pinyin"? Or it is actually 3rd party backend so there is nothing we can do (not sure how Google maintain this IME, but that 2022 revision was "enforced" since August 2023)?