Fix heading for vllm model inferencing (#123)

Author: statiraju

Popular_Models_Guide/Llama2/vllm_guide.md

@@ -26,6 +26,8 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 -->
 
+# Deploying Llama2-7B Model with Triton and vLLM
+
 The vLLM Backend uses vLLM to do inference. Read more about vLLM [here](https://blog.vllm.ai/2023/06/20/vllm.html) and the vLLM Backend [here](https://github.com/triton-inference-server/vllm_backend).
 
 ## Pre-build instructions
@@ -114,4 +116,4 @@ The future of AI is
 The future of AI is in the hands of the people who use it.
 
 =========
-```
+```