Update wpf for preview 7 (#10005)

* Update wpf for preview 7

* Add details

* Fix version

* Update wpf.md

* Update wpf.md

---------

Co-authored-by: Andy (Steve) De George <[email protected]>
Co-authored-by: Jon Galloway <[email protected]>

Author: 3 people

release-notes/10.0/preview/preview7/wpf.md

@@ -2,12 +2,19 @@
 
 Here's a summary of what's new in WPF in this preview release:
 
-- [Feature](#feature)
+- [Bug Fixes](#bug-fixes)
+- [Fluent Theme Improvements](#fluent-theme-improvements)
 
 WPF updates in .NET 10:
 
-- [What's new in WPF](https://learn.microsoft.com/dotnet/desktop/wpf/whats-new/) documentation
+- [What's new in WPF in .NET 10](https://learn.microsoft.com/dotnet/desktop/wpf/whats-new/net100) documentation.
 
-## Feature
+## Bug Fixes
 
-Something about the feature
+- Avoided `UCEERR_RENDERTHREADFAILURE` in applications using ***D3DImage**, when the monitor is unavailable.
+
+## Fluent Theme Improvements
+
+- Fixed some accessibility issues in Fluent control styles (`DatePicker`, `DataGrid`).
+- Unified text control Fluent style resources.
+- Fixed localization resources for `ScrollBar`.