Bump dtolnay/rust-toolchain

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from be73d7920c329f220ce78e0234b8f96b7ae60248 to dc6353516c68da0f06325f42ad880f76a5e77ec9.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](https://github.com/dtolnay/rust-toolchain/compare/be73d7920c329f220ce78e0234b8f96b7ae60248...dc6353516c68da0f06325f42ad880f76a5e77ec9)

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

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

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install ${{ steps.gettoolchain.outputs.toolchain }} Rust toolchain
         # Latest version available on this commit is 1.71.1
         # Commit date is Aug 3, 2023
-        uses: dtolnay/rust-toolchain@be73d7920c329f220ce78e0234b8f96b7ae60248
+        uses: dtolnay/rust-toolchain@dc6353516c68da0f06325f42ad880f76a5e77ec9
         with:
           toolchain: ${{ steps.gettoolchain.outputs.toolchain }}