Upgrade regex-syntax to 0.6.29 am: 713de16f11

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/regex-syntax/+/2519958

Change-Id: I31430ca9bb62bb78a701e7fe12c8575f6b4910f1
Signed-off-by: Automerger Merge Worker <[email protected]>