Don't set a fixed width, autoscale, add border

Author: agriyakhetarpal

web/pandas/getting_started.md

@@ -42,6 +42,5 @@ without needing to install anything on your system.
 
 <iframe
   src="./lite/repl/index.html?toolbar=1&kernel=python&execute=0&code=import%20pandas%20as%20pd%0Adf%20%3D%20pd.DataFrame%28%7B%22num_legs%22%3A%20%5B2%2C%204%5D%2C%20%22num_wings%22%3A%20%5B2%2C%200%5D%7D%2C%20index%3D%5B%22falcon%22%2C%20%22dog%22%5D%29%0Adf"
-  width="100%"
-  height="500px"
+  style="width: 100%; max-width: 650px; height: 600px; border: 1px solid #130753;"
 ></iframe>