Fix: nbviewer does not render notebooks without any code cells correctly (#2259)

Co-authored-by: juston <[email protected]>

Author: casper-oai

examples/chatgpt/gpt_actions_library/gpt_action_zapier.ipynb

@@ -127,7 +127,10 @@
  ],
  "metadata": {
   "language_info": {
-   "name": "python"
+   "file_extension": ".md",
+   "mimetype": "text/markdown",
+   "name": "python",
+   "nbconvert_exporter": "markdown"
   }
  },
  "nbformat": 4,

examples/gpt-5-codex_prompting_guide.ipynb

@@ -177,7 +177,10 @@
  ],
  "metadata": {
   "language_info": {
-   "name": "python"
+   "file_extension": ".md",
+   "mimetype": "text/markdown",
+   "name": "python",
+   "nbconvert_exporter": "markdown"
   }
  },
  "nbformat": 4,

examples/gpt-5/gpt-5-1_prompting_guide.ipynb

@@ -584,7 +584,10 @@
  ],
  "metadata": {
   "language_info": {
-   "name": "python"
+   "file_extension": ".md",
+   "mimetype": "text/markdown",
+   "name": "python",
+   "nbconvert_exporter": "markdown"
   }
  },
  "nbformat": 4,

examples/gpt-5/gpt-5_troubleshooting_guide.ipynb

@@ -173,7 +173,10 @@
  ],
  "metadata": {
   "language_info": {
-   "name": "python"
+   "file_extension": ".md",
+   "mimetype": "text/markdown",
+   "name": "python",
+   "nbconvert_exporter": "markdown"
   }
  },
  "nbformat": 4,

examples/sora/sora2_prompting_guide.ipynb

@@ -432,8 +432,10 @@
       "name": "python3"
     },
     "language_info": {
+      "file_extension": ".md",
+      "mimetype": "text/markdown",
       "name": "python",
-      "version": "3"
+      "nbconvert_exporter": "markdown"
     }
   },
   "nbformat": 4,

examples/stripe_model_eval/selecting_a_model_based_on_stripe_conversion.ipynb

@@ -195,7 +195,10 @@
  ],
  "metadata": {
   "language_info": {
-   "name": "python"
+   "file_extension": ".md",
+   "mimetype": "text/markdown",
+   "name": "python",
+   "nbconvert_exporter": "markdown"
   }
  },
  "nbformat": 4,