Bump dtolnay/rust-toolchain (#405)

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 1f5cdb56c8779e3efa22473ce181ff83143b172c to 0e66bd3e6b38ec0ad5312288c83e47c143e6b09e.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@1f5cdb5...0e66bd3)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@1f5cdb56c8779e3efa22473ce181ff83143b172c
+      - uses: dtolnay/rust-toolchain@0e66bd3e6b38ec0ad5312288c83e47c143e6b09e
         with:
           toolchain: ${{ matrix.RUST }}
           components: rustfmt, clippy
@@ -77,7 +77,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@1f5cdb56c8779e3efa22473ce181ff83143b172c
+      - uses: dtolnay/rust-toolchain@0e66bd3e6b38ec0ad5312288c83e47c143e6b09e
         with:
           toolchain: ${{ matrix.RUST.VERSION }}
 
@@ -102,7 +102,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@1f5cdb56c8779e3efa22473ce181ff83143b172c
+      - uses: dtolnay/rust-toolchain@0e66bd3e6b38ec0ad5312288c83e47c143e6b09e
         with:
           toolchain: nightly
           components: llvm-tools-preview