chore: u‌‌pdat‌e code block

README.md

@@ -18,12 +18,18 @@ Meta developed and released the Meta Llama 3 family of large language models (LL
 ## Use it with Jan (UI)
 
 1. Install **Jan** using [Quickstart](https://jan.ai/docs/quickstart)
-2. Use `cortexhub/llama3` in Jan model Hub
+2. Use in Jan model Hub:
+    ```
+    cortexhub/llama3
+    ```
 
 ## Use it with Cortex (CLI)
 
 1. Install **Cortex** using [Quickstart](https://cortex.jan.ai/docs/quickstart)
-2. Run the model with the command: `cortex run llama3`
+2. Run the model with command:
+    ```
+    cortex run llama3
+    ```
 
 ## Credits