Bump backtrace from 0.3.30 to 0.3.31
Bump backtrace from 0.3.30 to 0.3.31

Bumps [backtrace](https://github.com/rust-lang/backtrace-rs) from 0.3.30 to 0.3.31.
- [Release notes](https://github.com/rust-lang/backtrace-rs/releases)
- [Commits](https://github.com/rust-lang/backtrace-rs/compare/0.3.30...0.3.31)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alex/otp-cop