Update September 14-19 changelog to focus on user-facing changes (#1457)

* Update changelog.mdx

* mash the 2 together

* fix title

---------

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
Co-authored-by: Hahnbee Lee <[email protected]>

Author: mintlify[bot]

changelog.mdx

@@ -74,26 +74,24 @@ noindex: true
 
 </Update>
 
-<Update label="September 14 - September 19" tags={["Improvements"]} rss={{ title: "Weekly Updates", description: "GitLab integration enhancements, app router migration progress, authentication improvements, and bug fixes" }}>
+<Update label="September 14 - September 19" tags={["Improvements"]} rss={{ title: "Weekly Updates", description: "Web editor and authentication improvements, and bug fixes" }}>
 
-## GitLab integration enhancements
-
-- Enhanced GitLab connection UI in dashboard settings for easier repository management
-- Added webhook support for automatic documentation updates on GitLab commits
-
-## Web editor and authentication improvements
+## Web editor and dashboard login improvements
 
 - Continued app router migration for the web editor, removing blockers and improving performance
 - Enhanced login error handling with explicit email validation messages
 - Fixed whitespace handling in email address validation
 
-## Bug fixes and reliability
+## Authentication improvements
 
-- Fixed app router socket update functionality for real-time features
+- Added support for validated redirect parameters in login callback to reduce login friction
+- Improved login flow for SSO with better redirect handling
+
+## Bug fixes and reliability
+- Fixed GitLab integration issues with larger repositories
+- Improved dashboard loading performance with optimized deployment queries
 - Fixed SVG path rendering issues in documentation
 - Fixed keyboard navigation in search and chat functionality
-- Fixed history status endpoint reliability
-- Resolved middleware edge cases and onClick event handling issues
 
 </Update>