Update net100.md files for .NET 10 RC2 release (#2140)

* Initial plan

* Update net100.md files for RC2 release

Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

Author: Copilot

dotnet-desktop-guide/winforms/whats-new/net100.md

@@ -2,7 +2,7 @@
 title: What's new in WinForms for .NET 10 Release Candidate
 description: Learn about what's new in Windows Forms for .NET 10 Release Candidate. New versions of Windows Forms are released yearly with .NET.
 ms.topic: whats-new
-ms.date: 09/09/2025
+ms.date: 10/08/2025
 ms.service: dotnet-desktop
 ms.update-cycle: 365-days
 dev_langs:
@@ -15,12 +15,13 @@ dev_langs:
 
 This article provides a high-level overview about what's new with Windows Forms (WinForms) in .NET 10 Release Candidate. For detailed information, see the [release announcements](#release-announcements).
 
-.NET 10 RC 1 was released in September 2025.
+.NET 10 RC 2 was released in October 2025.
 
 ## Release announcements
 
 Each release announcement provides detailed information about Windows Forms changes for .NET 10:
 
+- [.NET 10 RC2](https://aka.ms/dotnet/10/rc2)
 - [.NET 10 RC1](https://aka.ms/dotnet/10/rc1)
 - [.NET 10 Preview 7](https://aka.ms/dotnet/10/preview7)
 - [.NET 10 Preview 6](https://aka.ms/dotnet/10/preview6)

dotnet-desktop-guide/wpf/whats-new/net100.md

@@ -2,7 +2,7 @@
 title: What's new in WPF for .NET 10 Release Candidate
 description: Learn about what's new in Windows Presentation Foundation (WPF) for .NET 10 Release Candidate. New versions of WPF are released yearly with .NET.
 ms.topic: whats-new
-ms.date: 09/09/2025
+ms.date: 10/08/2025
 ms.service: dotnet-desktop
 ms.update-cycle: 365-days
 #customer intent: As a developer, I want to know what's changed so that I can remain up-to-date.
@@ -12,12 +12,13 @@ ms.update-cycle: 365-days
 
 This article provides a high-level overview about what's new with Windows Presentation Foundation (WPF) in .NET 10 Release Candidate. For detailed information, see the [release announcements](#release-announcements).
 
-.NET 10 RC 1 was released in September 2025.
+.NET 10 RC 2 was released in October 2025.
 
 ## Release announcements
 
 Each release announcement provides detailed information about WPF changes for .NET 10:
 
+- [.NET 10 RC2](https://aka.ms/dotnet/10/rc2)
 - [.NET 10 RC1](https://aka.ms/dotnet/10/rc1)
 - [.NET 10 Preview 7](https://aka.ms/dotnet/10/preview7)
 - [.NET 10 Preview 6](https://aka.ms/dotnet/10/preview6)