Specify toolchain in CI

[Thom Chiovoloni (thomcc-work)]

This should fix CI.

[Copilot]

🟢 Approval recommended

The focused workflow change correctly specifies the intended toolchain.

0 open findings

What changed in this PR

Explicitly configures the Rust toolchain to restore the Copilot setup workflow.

Changes:

• Sets dtolnay/rust-toolchain to install stable Rust.

File	Description
.github/​workflows/​copilot-setup-steps.yml	Adds the required stable toolchain input.

🧠 Review effort: Balanced

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[Copilot]

One or more custom setup steps configured for this repository failed during this Copilot code review run:

Install Rust toolchain (stable)

Setup steps run before each review. If the review above is missing context, or no review was posted at all, the failing step above may be the cause. See the workflow run for failure details, fix your setup steps configuration, and re-request a review.

Note

You can configure setup steps for Copilot code review separately from Copilot cloud agent with a copilot-code-review.yml file. Read the docs for details.