fix image docs

Author: patrickvonplaten

docs/source/imgs/access_request.png

@@ -71,7 +71,11 @@ If this is a private repository, make sure to pass a token having permission to
 Therefore, we need to make sure to *click-accept* the license. You can do this by simply visiting 
 the [model card](https://huggingface.co/runwayml/stable-diffusion-v1-5) and clicking on "Agree and access repository":
 
-![access_request](https://github.com/patrickvonplaten/scientific_images/blob/master/access_request.png)
+<p align="center">
+    <br>
+    <img src="https://raw.githubusercontent.com/huggingface/diffusers/main/docs/source/imgs/access_request.png" width="400"/>
+    <br>
+</p>
 
 Second, you need to login with your access token: