chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
Swatinem/rust-cache	action	pinDigest	→ 6323deb
actions/checkout	action	pinDigest	→ 11d5960
actions/download-artifact	action	pinDigest	→ d3f86a1
actions/upload-artifact	action	pinDigest	→ ea165f8
assertables	dev-dependencies	pin	9.5.0 → =9.9.0
dtolnay/rust-toolchain	action	pinDigest	→ 4360b52
kota65535/github-git-config-action	action	pinDigest	→ 519e6d2
mermaid	devDependencies	pin	^11.16.0 → 11.16.1
rstest	dev-dependencies	pin	0.26.0 → =0.26.1
vitepress (source)	devDependencies	pin	^1.6.4 → 1.6.4
vitepress-plugin-llms	devDependencies	pin	^1.13.4 → 1.13.5
vitepress-plugin-mermaid	devDependencies	pin	^2.0.17 → 2.0.17

⚠️ Renovate's pin functionality does not currently wire in the release age for a package, so the Minimum Release Age checks can apply. You will need to manually validate the Minimum Release Age for these package(s).

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