Fix vllm and vllm-fork tags (#1766)

Signed-off-by: ZePan110 <ze.pan@intel.com>

WorkflowExecAgent/tests/2_start_vllm_service.sh

@@ -19,7 +19,7 @@ function build_vllm_docker_image() {
     if [ ! -d "./vllm" ]; then
         git clone https://github.com/vllm-project/vllm.git
         cd vllm
-        VLLM_VER="$(git describe --tags "$(git rev-list --tags --max-count=1)" )"
+        VLLM_VER="v0.8.2"
         echo "Check out vLLM tag ${VLLM_VER}"
         git checkout ${VLLM_VER} &> /dev/null
         git rev-parse HEAD