Update docs metadata (#3781)

docs/reference/hub/__init__.md

@@ -1,3 +1,8 @@
+---
+description: Explore Ultralytics hub functions for model resetting, checking datasets, model exporting and more. Easy-to-follow instructions provided.
+keywords: Ultralytics, hub functions, model export, dataset check, reset model, YOLO Docs
+---
+
 ## login
 ---
 ### ::: ultralytics.hub.login
@@ -36,4 +41,4 @@
 ## check_dataset
 ---
 ### ::: ultralytics.hub.check_dataset
-<br><br>
+<br><br>

docs/reference/hub/auth.md

@@ -1,4 +1,9 @@
+---
+description: Dive into the Ultralytics Auth API documentation & learn how to manage authentication in your AI & ML projects easily and effectively.
+keywords: Ultralytics, Auth, API documentation, User Authentication, AI, Machine Learning
+---
+
 ## Auth
 ---
 ### ::: ultralytics.hub.auth.Auth
-<br><br>
+<br><br>

docs/reference/hub/session.md

@@ -1,4 +1,9 @@
+---
+description: Explore details about the HUBTrainingSession in Ultralytics framework. Learn to utilize this functionality for effective model training.
+keywords: Ultralytics, HUBTrainingSession, Documentation, Model Training, AI, Machine Learning, YOLO
+---
+
 ## HUBTrainingSession
 ---
 ### ::: ultralytics.hub.session.HUBTrainingSession
-<br><br>
+<br><br>

docs/reference/hub/utils.md

@@ -1,3 +1,8 @@
+---
+description: Explore Ultralytics docs for various Events, including "request_with_credentials" and "requests_with_progress". Also, understand the use of the "smart_request".
+keywords: Ultralytics, Events, request_with_credentials, smart_request, Ultralytics hub utils, requests_with_progress
+---
+
 ## Events
 ---
 ### ::: ultralytics.hub.utils.Events
@@ -16,4 +21,4 @@
 ## smart_request
 ---
 ### ::: ultralytics.hub.utils.smart_request
-<br><br>
+<br><br>