ci: Bump dtolnay/rust-toolchain

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 439cf607258077187679211f12aa6f19af4a0af7 to be73d7920c329f220ce78e0234b8f96b7ae60248.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@439cf60...be73d79)

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

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

.github/workflows/ci.yaml

@@ -34,7 +34,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup Rust
-        uses: dtolnay/rust-toolchain@439cf607258077187679211f12aa6f19af4a0af7 # v1
+        uses: dtolnay/rust-toolchain@be73d7920c329f220ce78e0234b8f96b7ae60248 # v1
         with:
           toolchain: stable
           components: clippy
@@ -74,7 +74,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@439cf607258077187679211f12aa6f19af4a0af7 # v1
+      - uses: dtolnay/rust-toolchain@be73d7920c329f220ce78e0234b8f96b7ae60248 # v1
         with:
           toolchain: stable
           components: rustfmt
@@ -148,7 +148,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Rust
-        uses: dtolnay/rust-toolchain@439cf607258077187679211f12aa6f19af4a0af7 # v1
+        uses: dtolnay/rust-toolchain@be73d7920c329f220ce78e0234b8f96b7ae60248 # v1
         with:
           toolchain: stable
           target: ${{ matrix.target }}