Pin GitHub Actions to full-length commit SHAs - #90

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505, actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af, actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

`spartan` (lib) generated 2 warnings (run `cargo fix --lib -p spartan` to apply 1 suggestion)

struct `ConstPolyCommitment` is never constructed

unnecessary parentheses around closure body

`/home/runner/work/Spartan/Spartan/.cargo/config` is deprecated in favor of `config.toml`

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/