Update `README`

Signed-off-by: Xin Liu <sam@secondstate.io>

README.md

@@ -1,3 +1,10 @@
----
-license: apache-2.0
----
+# CodeShell-7B-Chat-GGUF
+
+## Prompt Template
+
+```bash
+## human: {query}
+## assistant: {response}
+## human: {query}
+## assistant:
+```