update aws-smithy-runtime to fix build with recent rustc

Summary:
Update aws-smithy-runtime and the packages that depend on it to make recent rustc happy

I was seeing [errors in github builds using aws-smithy and latest rust from dtolnay/rust-toolchain@stable](https://github.com/facebook/sapling/actions/runs/18241994774/job/51945084175?pr=1135). Updating fixes them.

Differential Revision: D83905100

fbshipit-source-id: 13d4edec4ebffb85d51ede12f4edd4806d92fdbf

Author: ahornby