some more target-spec-miette fixes #1420

Job	Run time
Build documentation (ubuntu-latest)	1m 0s
Cross-compile to aarch64	1m 24s
Build and test core crates (ubuntu-latest, 1.78)	1m 50s
Build and test core crates (ubuntu-latest, stable)	2m 3s
Build and test core crates (macos-14, 1.78)	1m 45s
Build and test (all features) (ubuntu-latest, 1.78)	2m 57s
Lint	1m 24s
Build and test core crates (macos-14, stable)	1m 38s
Build and test (all features) (ubuntu-latest, stable)	3m 30s
Build and test core crates (windows-latest, 1.78)	4m 30s
Build and test (all features) (macos-14, 1.78)	2m 46s
cargo-compare extended tests (ubuntu-latest)	1m 10s
Build and test core crates (windows-latest, stable)	6m 6s
Build and test (all features) (macos-14, stable)	2m 26s
cargo-compare extended tests (macos-14)	1m 46s
Build and test (all features) (windows-latest, 1.78)	6m 19s
Build and test (all features) (windows-latest, stable)	5m 26s
	48m 0s

Provide feedback