[CI] Fix data load failure in benchmark dashboard (#19298)

#19128 had an undocumented change
3b04aeb#diff-e0c290ed8fe811027fdd5f6642d02a9f0e20e9982e0219cbc45da666b014534cR1180
that breaks previous configuration files. This PR fixes our benchmark
dashboard configuration to adhere to this new change.

Author: ianayl

.github/workflows/sycl-docs.yml

@@ -53,7 +53,7 @@ jobs:
         touch .nojekyll
         # Update benchmarking dashboard configuration
         cat << EOF > benchmarks/config.js
-        remoteDataUrl = 'https://raw.githubusercontent.com/intel/llvm-ci-perf-results/refs/heads/unify-ci/data.json';
+        remoteDataUrl = 'https://raw.githubusercontent.com/intel/llvm-ci-perf-results/refs/heads/unify-ci/';
         defaultCompareNames = ["Baseline_PVC_L0"];
         EOF
     # Upload the generated docs as an artifact and deploy to GitHub Pages.