docs: fix typo (#827)

Co-authored-by: John Octubre <[email protected]>

examples/GPT_with_vision_for_video_understanding.ipynb

@@ -6,7 +6,7 @@
    "source": [
     "# Processing and narrating a video with GPT's visual capabilities and the TTS API\n",
     "\n",
-    "This notebook demonstrates how to use GPT's visual capabilities with a video. GPT-4 doesn't take videos as input directly, but we can use vision and the new 128K context widnow to describe the static frames of a whole video at once. We'll walk through two examples:\n",
+    "This notebook demonstrates how to use GPT's visual capabilities with a video. GPT-4 doesn't take videos as input directly, but we can use vision and the new 128K context window to describe the static frames of a whole video at once. We'll walk through two examples:\n",
     "\n",
     "1. Using GPT-4 to get a description of a video\n",
     "2. Generating a voiceover for a video with GPT-4 and the TTS API\n"