Revert ":construction_worker: pin nightly Rust version to nightly-2025-12-09 in CI workflow"

[ChanTsune]

Reverts #2452

Summary by CodeRabbit

• Chores
  • Updated CI workflow: switched Rust Nightly from a specific dated release to the generic "nightly" channel to simplify tooling updates and maintenance.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[coderabbitai]

📝 Walkthrough

Walkthrough

The GitHub Actions WebAssembly workflow was changed to reference the generic Rust nightly toolchain (nightly) instead of a pinned dated nightly (nightly-2025-12-09).

Changes

Cohort / File(s)	Summary
CI/CD Workflow Configuration ​.github/workflows/webassembly.yml	Replaced pinned Rust toolchain nightly-2025-12-09 with the generic nightly channel (one-line change).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐇 I hopped from dated nights to free,
A channel breeze now carries me,
No calendar to bind my pace,
Just nightly stars across my race,
Hooray — new builds with open grace!

🚥 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 accurately describes the main change: reverting a previous commit that pinned the nightly Rust version to a specific date in the CI workflow.
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.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}