Update to syn-2 am: ed8925a283

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tracing-attributes/+/2523895

Change-Id: Ia90b305dfe71833d9d6c9e2745a9e81bc1a8c8b4
Signed-off-by: Automerger Merge Worker <[email protected]>