change port to 7860 (#1436)

Author: thomasht86

docs/hub/spaces-sdks-python.md

@@ -6,7 +6,7 @@ Spaces now support arbitrary Dockerfiles so you can host any Python app directly
 
 </Tip>
 
-While not an official workflow, you are able to run your own Python + interface stack in Spaces by selecting Gradio as your SDK and serving a frontend on port `7680`. See the [templates](https://huggingface.co/templates#spaces) for examples.
+While not an official workflow, you are able to run your own Python + interface stack in Spaces by selecting Gradio as your SDK and serving a frontend on port `7860`. See the [templates](https://huggingface.co/templates#spaces) for examples.
 
 Spaces are served in iframes, which by default restrict links from opening in the parent page. The simplest solution is to open them in a new window: