use the upstream sycl branch for benchmark scripts

Author: pbalcer

.github/workflows/benchmarks-reusable.yml

@@ -81,7 +81,7 @@ jobs:
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       with:
         repository: intel/llvm
-        ref: unify-benchmark-ci
+        ref: sycl
         path: sc
         sparse-checkout: |
           devops/scripts/benchmarks