Bump dtolnay/rust-toolchain (#551)

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 888c2e1ea69ab0d4330cbf0af1ecc7b68f368cc1 to b3b07ba8b418998c39fb20f53e8b695cdcc8de1b.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@888c2e1...b3b07ba)

---
updated-dependencies:
- dependency-name: dtolnay/rust-toolchain
  dependency-version: b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.github/workflows/benchmark.yml

@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@888c2e1ea69ab0d4330cbf0af1ecc7b68f368cc1
+        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: stable
 

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@888c2e1ea69ab0d4330cbf0af1ecc7b68f368cc1
+      - uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: ${{ matrix.RUST }}
           components: rustfmt, clippy
@@ -72,7 +72,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@888c2e1ea69ab0d4330cbf0af1ecc7b68f368cc1
+      - uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: ${{ matrix.RUST.VERSION }}
 
@@ -100,7 +100,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@888c2e1ea69ab0d4330cbf0af1ecc7b68f368cc1
+      - uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b
         with:
           toolchain: "1.74"
           components: llvm-tools-preview