update benchmark scripts

Author: bratpiorka

.github/workflows/reusable_benchmarks.yml

@@ -19,6 +19,10 @@ on:
         type: boolean
         default: false
 
+# testing only
+on:
+  pull_request:
+
 permissions:
   contents: read
   pull-requests: write
@@ -103,7 +107,8 @@ jobs:
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         repository: intel/llvm
-        ref: nightly-2025-02-19
+        # add preloaded UMF benchmarks (#17278)
+        ref: b2f9dab5266d227cc9eb19af1b54c5bdc50221d1
         path: sycl-repo
         fetch-depth: 1