Update .github/workflows/ci.yml

Author: utpilla

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         submodules: true
-    - uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # master
+    - uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0
       with:
         toolchain: ${{ matrix.rust }}
         components: rustfmt