github: fix challenge program template (#8952)
github: fix challenge program template (#8952)

Signed-off-by: hi-rustin <c7d168847ad25898cad3ce2d480246882ded574b@gmail.com>
pingcap/tikv,pingcap/tikv,BusyJay/tikv,BusyJay/tikv,c4pt0r/tikv,BusyJay/tikv,BusyJay/tikv