fix: avoid JSONDecodeError for empty line stream response

Author: johnny0120

ollama/_client.py

@@ -167,6 +167,8 @@ def inner():
             raise ResponseError(e.response.text, e.response.status_code) from None
 
           for line in r.iter_lines():
+            if not line:
+              continue
             part = json.loads(line)
             if err := part.get('error'):
               raise ResponseError(err)