Upgrade rust/crates/regex to 1.4.5 am: ffb6030a53 am: 5461377b71

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex/+/1663020

Change-Id: I21f6649f5ffff25c80c0d635bec7e4882d40d0c9