Add EOL date for .NET 9 (#9360)

* Add EOL date for .NET 9

* Update releases.md

Author: richlander

releases.md

@@ -10,7 +10,7 @@ The following table lists in-support .NET releases.
 
 |  Version  | Release Date | Support | Latest Patch Version | End of Support |
 | :-- | :-- | :-- | :-- | :-- |
-| [.NET 9](release-notes/9.0/README.md) | November 12, 2024 | [STS][policies] | [9.0.0-preview.5][9.0.0-preview.5] |  |
+| [.NET 9](release-notes/9.0/README.md) | November 12, 2024 | [STS][policies] | [9.0.0-preview.5][9.0.0-preview.5] | May 11, 2026 |
 | [.NET 8](release-notes/8.0/README.md) | [November 14, 2023](https://devblogs.microsoft.com/dotnet/announcing-dotnet-8/) | [LTS][policies] | [8.0.6][8.0.6] | November 10, 2026 |
 | [.NET 6](release-notes/6.0/README.md) | [November 8, 2021](https://devblogs.microsoft.com/dotnet/announcing-net-6/) | [LTS][policies] | [6.0.31][6.0.31]  | November 12, 2024 |