Update support policy (#3656)

Author: pmaytak

supportPolicy.md

@@ -1,19 +1,20 @@
 # Microsoft.Identity.Web Support Policy
 
-_Last updated May 12, 2025_
+_Last updated December 16, 2025_
 
 ## Supported versions
 The following table lists IdentityWeb versions currently supported and receiving security fixes.
 
 | Major Version | Last Release | Patch Release Date  | Support Phase|End of Support |
 | --------------|--------------|--------|------------|--------|
-| 3.x           | [![NuGet](https://img.shields.io/nuget/v/Microsoft.Identity.Web.svg?style=flat-square&label=nuget&colorB=00b200)](https://www.nuget.org/packages/Microsoft.Identity.Web/)   |Monthly| Active | Not planned.<br/>✅Supported versions: from 3.0.0 to [![NuGet](https://img.shields.io/nuget/v/Microsoft.Identity.Web.svg?style=flat-square&label=nuget&colorB=00b200)](https://www.nuget.org/packages/Microsoft.Identity.Web/)<br/>⚠️Unsupported versions `< 3.0.0`.|
+| 4.x           | [![NuGet](https://img.shields.io/nuget/v/Microsoft.Identity.Web.svg?style=flat-square&label=nuget&colorB=00b200)](https://www.nuget.org/packages/Microsoft.Identity.Web/)   |Monthly| Active | Not planned.<br/>✅Supported versions: from 4.0.0 to [![NuGet](https://img.shields.io/nuget/v/Microsoft.Identity.Web.svg?style=flat-square&label=nuget&colorB=00b200)](https://www.nuget.org/packages/Microsoft.Identity.Web/)<br/>⚠️Unsupported versions `< 4.0.0`.|
 
 ## Out of support versions
 The following table lists Microsoft.Identity.Web versions no longer supported and no longer receiving security fixes.
 
 | Major Version | Latest Patch Version| Patch Release Date | End of Support Date|
 | --------------|--------------|--------|--------|
+| 3.x           | 3.14.1       |  August 27, 2025         | October 13, 2025 |
 | 2.x           | 2.21.0       |  July 18, 2024         | January 1, 2025 |
 | 1.x           | 1.26.0       | February 5, 2023       | February 5, 2023|