update changelog before snap (#8212)

Author: dibarbet

CHANGELOG.md

@@ -25,6 +25,9 @@
   * Fix crash in backing field nullability cycle scenario(PR: [#77993](https://github.com/dotnet/roslyn/pull/77993))
   * Fix EA layering for Razor.ExternalAccess(PR: [#77927](https://github.com/dotnet/roslyn/pull/77927))
   * Simplify workspace initialization in the LSP server(PR: [#78010](https://github.com/dotnet/roslyn/pull/78010))
+* Support Html requests in cohosting(PR: [#8210](https://github.com/dotnet/vscode-csharp/pull/8210))
+* Allow the Roslyn client to log messages from Razor(PR: [#8201](https://github.com/dotnet/vscode-csharp/pull/8201))
+* Add cohost option to Razor(PR: [#8189](https://github.com/dotnet/vscode-csharp/pull/8189))
 
 # 2.74.x
 * Bump xamlTools to 17.14.36010.33 (PR: [#8178](https://github.com/dotnet/vscode-csharp/pull/8178))