Feature/notebook update stable audio 2 5 (#312)

* Add stable audio 2.5 and audio inpaint

* Fix upscale pricing

* Fix default cfg scale and steps for Stable Audio 2.5

* Drop strength for inpaint

Author: enzymezoo-code

nbs/Stable_Audio_API.ipynb

@@ -1018,7 +1018,9 @@
         "- Creative Upscaler: This service will transform a low quality, low resolution image into a stunning work of art with intricate details at 9mp resolution - regardless of the input resolution. Provide an input image of poor quality and add a `prompt` that describes the desired output. High `creativity` (up to 0.35) will yield dramatic changes to the image.\n",
         "This service will use 25 credits.\n",
         "\n",
-        "- Conservative Upscaler: Upscale and image to 4K resolution while minimizing alterations to the image. This service will use 3 credits.\n",
+        "- Conservative Upscaler: Upgrade low-res to 4k without reinterpreting the image. This service will use 25 credits.\n",
+        "\n",
+        "- Fast Upscaler: Simple, low-cost upscaler to increase image resolution by 4, up to 4 megapixels. This service will use 1 credit.\n",
         "\n",
         "See https://platform.stability.ai/docs/api-reference#tag/Upscale\n",
         "\n",