Update stale.yml HUB URL (#3468)

.github/workflows/stale.yml

@@ -19,7 +19,7 @@ jobs:
             - **Docs** – https://docs.ultralytics.com
 
             Access additional [Ultralytics](https://ultralytics.com) ⚡ resources:
-            - **Ultralytics HUB** – https://hub.ultralytics.com
+            - **Ultralytics HUB** – https://ultralytics.com/pricing
             - **Vision API** – https://ultralytics.com/yolov5
             - **About Us** – https://ultralytics.com/about
             - **Join Our Team** – https://ultralytics.com/work