chore(deps): update rust crate regex to 1.12.2 (#1762) #852

Job	Run time
cargo fmt	14s
cargo doc	1m 40s
codespell	14s
cargo clippy	1m 55s
⚖️ Check third party licenses	4m 51s
cargo shear (unused dependencies)	13s
ubuntu / stable / coverage	3m 50s
tests as root	4m 4s
Unit test for embedded downloader	27s
build-widows-binary	8m 44s
K8s integration tests (part1)	12m 40s
Unit, docs and onhost integration tests	8m 14s
K8s integration tests (flux-self-update)	11m 0s
Build release binaries	6m 6s
K8s integration tests (part2)	10m 23s
security / Rust audit scanner	2m 30s
k8s-e2e-tests / K8s e2e tests infra	11m 29s
k8s-e2e-tests / K8s e2e tests	2s
🟢 All required checks and tests pass	2s
	1h 28m 38s

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