Update README.md [ci skip]
Update README.md [ci skip]

luacheck supports all LuaJIT versions, not only 2.0.

mpeterv/luacheck,xpol/luacheck,xpol/luacheck,xpol/luacheck,linuxmaniac/luacheck,mpeterv/luacheck,mpeterv/luacheck,linuxmaniac/luacheck