Update app.py

app.py

@@ -132,8 +132,8 @@ def create_and_push(space_type, hardware, private_space, other_model_name, radio
                                            )
         with open(readme_file_path, "r") as f:
             readme_content = f.read()
-
-        for line in content.split("\n"):
+        new_content = ""
+        for line in readme_content.split("\n"):
             if "sdk_version" in line:
                 new_content+="sdk_version: 3.10.1\n"
             else: