change benchmark julia version

Author: a

.github/workflows/benchmark_pr.yml

@@ -17,7 +17,7 @@ jobs:
 
       - uses: julia-actions/setup-julia@v2
         with:
-          version: "1.11.0-beta1"
+          version: "1.11"
 
       - name: Clone egg-benchmark repo
         run: git clone https://github.com/nmheim/egg-benchmark.git egg-benchmark