bump simple_logger to 4.1.0

[pdogr]

Running the command

cargo run --release --bin=icu4x-datagen --all-features -- --icuexport-root=provider/repodata/data/icuexport --syntax=postcard --out=/tmp/icu4x_data --overwrite --keys=segmenter/word@1 --all-locales

leads to the following error

thread 'main' panicked at 'Could not determine the UTC offset on this system. 
Possible causes are that the time crate does not implement "local_offset_at" on your system, 
or that you are running in a multi-threaded environment and the time crate is returning "None" from "local_offset_at" to avoid unsafe behaviour.

Bumping simple_logger to latest fixes this
borntyping/rust-simple_logger#48 (comment)

[robertbastian]

#3338

[robertbastian]

There's a third usage in ffi/diplomat.

We should probably merge and release #3339 first

[robertbastian]

^

[sffc]

lgtm