chore: upgrade sgl-kernel 0.1.1 (#5933)

.github/workflows/vllm-dependency-test.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install dependencies
         run: |
           bash scripts/ci_install_dependency.sh
-          pip install "vllm>=0.6.4.post1,<=0.7.2"
+          pip install "vllm==0.8.4"
           pip install "bitsandbytes>=0.44.0"
 
       - name: Run VLLM dependency tests