Update the backtrace submodule
Pick up the following pull requests: * ci: remove binary size check (not relevant in rust-lang/rust) <https://github.com/rust-lang/backtrace-rs/pull/710> * Upgrade `ruzstd`, `object`, and `addr2line` to the latest versions <https://github.com/rust-lang/backtrace-rs/pull/718>
This commit is contained in: