Nominate crazycs520 and zyguan as TiKV committers

[MyonKeminta]

[ti-chi-bot[bot]]

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• breezewish

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[MyonKeminta]

@breezewish @hicqu @AndreMouche PTAL

[wuhuizuo]

need update the json file.

[breezewish]

Congrats! @crazycs520 @zyguan