Update changelog version number

Author: dibarbet

CHANGELOG.md

@@ -5,7 +5,7 @@
 - [O# Parity] Nuget restore [#5725](https://github.com/dotnet/vscode-csharp/issues/5725)
 - Debug from .csproj and .sln [#5876](https://github.com/dotnet/vscode-csharp/issues/5876)
 
-## Latest
+## 2.10.28
 * Fix C# Debugger telemetry (PR: [#6627](https://github.com/dotnet/vscode-csharp/pull/6627))
 * Add support for deduping build diagnostics from C# Devkit (PR: [#6543](https://github.com/dotnet/vscode-csharp/pull/6543))
 * Update Roslyn to 4.9.0-1.23530.4 (PR: [#6603](https://github.com/dotnet/vscode-csharp/pull/6603))