chore(deps): bump dtolnay/rust-toolchain

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 67ef31d5b988238dd797d409d6f9574278e20537 to 2c7215f132e9ebf062739d9130488b56d53c060c.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@67ef31d...2c7215f)

---
updated-dependencies:
- dependency-name: dtolnay/rust-toolchain
  dependency-version: 2c7215f132e9ebf062739d9130488b56d53c060c
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/test.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Install Rust toolchain (${{ matrix.rust }})
         # dtolnay/rust-toolchain @ master (pinned to SHA below)
-        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537 # master 2026-04
+        uses: dtolnay/rust-toolchain@2c7215f132e9ebf062739d9130488b56d53c060c # master 2026-04
         with:
           toolchain: ${{ matrix.rust }}
           components: rustfmt, clippy