.NET 7 end of support (#9306)

* .NET 7 end of support

Move .NET 7 to end-of-life .NET versions.
Add link to 3.1 End of support announcement.

* Update releases.md

Author: karelz

releases.md

@@ -24,9 +24,9 @@ The following table lists end-of-life releases.
 
 |  Version  |  Release Date | Support | Final Patch Version | End of Support |
 | :-- | :-- | :-- | :-- | :-- |
-| [.NET 7](release-notes/7.0/README.md) |  [November 8, 2022](https://devblogs.microsoft.com/dotnet/announcing-dotnet-7/) | [STS][policies] | [7.0.19][7.0.19] |[May 14, 2024](https://devblogs.microsoft.com/dotnet/dotnet-7-end-of-support/) |
-| [.NET Core 3.1](release-notes/3.1/README.md) | [December 3, 2019](https://devblogs.microsoft.com/dotnet/announcing-net-core-3-1/) | [LTS][policies] | [3.1.32][3.1.32] | December 13, 2022 |
+| [.NET 7](release-notes/7.0/README.md) | [November 8, 2022](https://devblogs.microsoft.com/dotnet/announcing-dotnet-7/) | [STS][policies] | [7.0.19][7.0.19] |[May 14, 2024](https://devblogs.microsoft.com/dotnet/dotnet-7-end-of-support/) |
 | [.NET 5](release-notes/5.0/README.md) | [November 10, 2020](https://devblogs.microsoft.com/dotnet/announcing-net-5-0/) | [STS][policies] | [5.0.17][5.0.17] | [May 10, 2022](https://devblogs.microsoft.com/dotnet/dotnet-5-end-of-support-update/) |
+| [.NET Core 3.1](release-notes/3.1/README.md) | [December 3, 2019](https://devblogs.microsoft.com/dotnet/announcing-net-core-3-1/) | [LTS][policies] | [3.1.32][3.1.32] | [December 13, 2022](https://devblogs.microsoft.com/dotnet/net-core-3-1-will-reach-end-of-support-on-december-13-2022/) |
 | [.NET Core 3.0](release-notes/3.0/README.md) | [September 23, 2019](https://devblogs.microsoft.com/dotnet/announcing-net-core-3-0/) |  [STS][policies] | [3.0.3][3.0.3] | [March 3, 2020](https://devblogs.microsoft.com/dotnet/net-core-3-0-end-of-life/) |
 | [.NET Core 2.2](release-notes/2.2/README.md) | [December 4th, 2018](https://devblogs.microsoft.com/dotnet/announcing-net-core-2-2/) | [STS][policies] | [2.2.8][2.2.8] | [December 23, 2019](https://devblogs.microsoft.com/dotnet/net-core-2-2-will-reach-end-of-life-on-december-23-2019/) |
 | [.NET Core 2.1](release-notes/2.1/README.md) | [May 30, 2018](https://devblogs.microsoft.com/dotnet/announcing-net-core-2-1/) | [LTS][policies] | [2.1.30][2.1.30] | [August 21, 2021](https://devblogs.microsoft.com/dotnet/net-core-2-1-will-reach-end-of-support-on-august-21-2021/) |