Update README.md

Finished prompt template for codellama models

README.md

@@ -57,10 +57,13 @@ GGML files are for CPU + GPU inference using [llama.cpp](https://github.com/gger
 * [2, 3, 4, 5, 6 and 8-bit GGML models for CPU+GPU inference (deprecated)](https://huggingface.co/TheBloke/CodeLlama-13B-Python-GGML)
 * [Meta's original unquantised fp16 model in pytorch format, for GPU inference and for further conversions](https://huggingface.co/TheBloke/CodeLlama-13B-Python-fp16)
 
-## Prompt template: TBC
+## Prompt template:
 
 ```
-Info on prompt template will be added shortly.
+[INST] Write code to solve the following coding problem that obeys the constraints and
+passes the example test cases. Please wrap your code answer using ```:
+{PROMPT}
+[/INST]
 ```
 
 <!-- compatibility_ggml start -->