Update model id for stable diffusion in jumpstart

Author: vivekmadan2

introduction_to_amazon_algorithms/jumpstart_text_to_image/Amazon_JumpStart_Text_To_Image.ipynb

@@ -137,7 +137,7 @@
     "# display the model-ids in a dropdown to select a model for inference.\n",
     "model_dropdown = Dropdown(\n",
     "    options=txt2img_models,\n",
-    "    value=\"huggingface-txt2img-stable-diffusion-v1-4\",\n",
+    "    value=\"stabilityai-txt2img-stable-diffusion-v1-4\",\n",
     "    description=\"Select a model\",\n",
     "    style={\"description_width\": \"initial\"},\n",
     "    layout={\"width\": \"max-content\"},\n",