Need to fix the ReEntrancyError message sentence

[brew0722]

https://github.com/line/cosmwasm/blob/d81a930ee2d6d92980e2696b9c24bd984a3f71e4/packages/vm/src/errors/vm_error.rs#L134

Written sentences cause confusion.
The call target contract can be called multiple times within one message.
However, the case of being called again while the dynamic call call is not completed is only prohibited.

[loloicci]

closed via #200