Note about SSL certificates (#404)

ch02/01_main-chapter-code/ch02.ipynb

@@ -174,6 +174,14 @@
     "    urllib.request.urlretrieve(url, file_path)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "56488f2c-a2b8-49f1-aaeb-461faad08dce",
+   "metadata": {},
+   "source": [
+    "- (If you encounter an `ssl.SSLCertVerificationError` when executing the previous code cell, it might be due to using an outdated Python version; you can find [more information here on GitHub](https://github.com/rasbt/LLMs-from-scratch/pull/403))"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 3,