chore(ci): bump Swatinem/rust-cache from 2.9.0 to 2.9.1

[dependabot]

Bumps Swatinem/rust-cache from 2.9.0 to 2.9.1.

Release notes

Sourced from Swatinem/rust-cache's releases.

v2.9.1

Fix regression in hash calculation

Full Changelog: Swatinem/rust-cache@v2.9.0...v2.9.1

Changelog

Sourced from Swatinem/rust-cache's changelog.

Changelog

2.9.1

• Fix regression in hash calculation

2.9.0

• Update to node24
• Support running from within a nix shell
• Consider all installed toolchains for cache key
• Use case-insensitive comparison to determine exact cache hit

2.8.2

• Don't overwrite env for cargo-metadata call

2.8.1

• Set empty CARGO_ENCODED_RUSTFLAGS when retrieving metadata
• Various dependency updates

2.8.0

• Add support for warpbuild cache provider
• Add new cache-workspace-crates feature

2.7.8

• Include CPU arch in the cache key

2.7.7

• Also cache cargo install metadata

2.7.6

• Allow opting out of caching $CARGO_HOME/bin
• Add runner OS in cache key
• Adds an option to do lookup-only of the cache

2.7.5

• Support Cargo.lock format cargo-lock v4
• Only run macOsWorkaround() on macOS

2.7.3

• Work around upstream problem that causes cache saving to hang for minutes.

... (truncated)

Commits

• c193711 2.9.1
• 781e8d9 try reverting pipeline change
• 3d1fa46 add changelog
• See full diff in compare view

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