Update benchmarks.yml

Author: juliagmt-google

.github/workflows/benchmarks.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout XLA
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4 # v4.1.1
         with:
           repository: juliagmt/xla