Upgrade pest to 2.5.4 am: a80c7af46f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pest/+/2421220

Change-Id: Ie2da5146076af115fea119fbfedb942b19882f4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>