bump toolchain to 1.85

[tomtau]

Summary by CodeRabbit

• Chores
  • Updated Rust toolchain versions in CI configuration to use the latest stable and nightly releases.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated Rust toolchain versions across GitHub Actions configuration files. The action setup default toolchain incremented from 1.80.0 to 1.85.0, and CI workflow toolchain references updated from 1.83.0 to 1.85.0 alongside nightly toolchain date updates.

Changes

Cohort / File(s)	Summary
Rust Toolchain Version Bumps .github/actions/setup/action.yml, .github/workflows/ci.yml	Updated default and workflow Rust toolchain versions: action setup from 1.80.0 to 1.85.0; CI workflow from 1.83.0 to 1.85.0; nightly toolchains from nightly-2025-08-20 to nightly-2026-01-20 in no_std and semver-related steps.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• bump the CI toolchain to 1.82 #1101: Bumps Rust toolchain version strings in GitHub Actions workflow and setup configuration files.
• bump toolchain #1090: Updates the same GitHub Actions files (.github/workflows/ci.yml and .github/actions/setup/action.yml) to increment Rust toolchain defaults and versions.
• bump toolchain for cargo-msrv #1046: Modifies repository GitHub CI/toolchain configuration by updating toolchain versions in the same configuration files.

Suggested reviewers

• NoahTheDuke

Poem

🐰 A whisker twitch, a hop, hooray!
Rust toolchains climb version-way,
From eighty to eighty-five we leap,
With nightly dates in bundles steep,
Our action scripts now shine so bright! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: bumping the Rust toolchain version to 1.85 across both the setup action and CI workflow configuration files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

📝 Coding Plan

• Generate coding plan for human review comments

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[coderabbitai]

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

.github/workflows/ci.yml (1)

159-163: ⚠️ Potential issue | 🟠 Major

Update hardcoded nightly version in semvercheck.sh.

The CI workflow installs nightly-2026-01-20 (line 159), but semvercheck.sh hardcodes nightly-2025-08-20 on lines 11 and 24. Update both occurrences to match the workflow's nightly version.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In @.github/workflows/ci.yml around lines 159 - 163, The semvercheck.sh script
still hardcodes the old toolchain string "nightly-2025-08-20" in two places;
update both occurrences in semvercheck.sh to "nightly-2026-01-20" so the script
matches the CI workflow's toolchain value (ensure you replace the exact string
"nightly-2025-08-20" wherever it appears, e.g., the two hardcoded nightly
variables/values).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Outside diff comments:
In @.github/workflows/ci.yml:
- Around line 159-163: The semvercheck.sh script still hardcodes the old
toolchain string "nightly-2025-08-20" in two places; update both occurrences in
semvercheck.sh to "nightly-2026-01-20" so the script matches the CI workflow's
toolchain value (ensure you replace the exact string "nightly-2025-08-20"
wherever it appears, e.g., the two hardcoded nightly variables/values).

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 2d09161d-ccfb-477c-a19a-0bfbc6dbea68

📥 Commits

Reviewing files that changed from the base of the PR and between 79dd30d and bb24676.

📒 Files selected for processing (2)

• .github/actions/setup/action.yml
• .github/workflows/ci.yml