Update Rust crate regex to 1.13.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
regex	build-dependencies	patch	1.12.2 → 1.13.0
regex	dependencies	patch	1.12.2 → 1.13.0

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[spenserblack]

Oh, I didn't notice that dependabot updated only the Cargo.lock, and skipped the Cargo.toml. Strange, I always thought dependabot would update the manifest by default 🤔
#1792