build(deps): bump dtolnay/rust-toolchain

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9 to 67ef31d5b988238dd797d409d6f9574278e20537.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@3c5f7ea...67ef31d)

---
updated-dependencies:
- dependency-name: dtolnay/rust-toolchain
  dependency-version: 67ef31d5b988238dd797d409d6f9574278e20537
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
-      - uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # stable
+      - uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # stable
         with:
           toolchain: stable
           components: rustfmt, clippy

.github/workflows/release.yml

@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
-      - uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # stable
+      - uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # stable
         with:
           toolchain: stable
           components: rustfmt, clippy