chore(deps): update rust crate httpmock to 0.8.0 #645

Job	Run time
codespell	10s
cargo clippy	2m 4s
ubuntu / stable / coverage	3m 57s
cargo fmt	12s
cargo shear (unused dependencies)	10s
cargo doc	1m 41s
⚖️ Check third party licenses	4m 49s
Unit test for embedded downloader	25s
K8s integration tests (part1)	18m 9s
K8s integration tests (part2)	13m 37s
build-widows-binary	8m 58s
Build release binaries	5m 55s
Unit, docs and onhost integration tests	9m 46s
K8s integration tests (flux-self-update)	12m 18s
tests as root	4m 0s
security / Rust audit scanner	2m 45s
k8s-e2e-tests / K8s e2e tests infra	12m 1s
k8s-e2e-tests / K8s e2e tests	2s
🟢 All required checks and tests pass	3s
	1h 41m 2s

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