Use roslyn version with restore support

Author: dibarbet

CHANGELOG.md

@@ -5,6 +5,11 @@
 - [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)
 
+## Next (Replace once current release version is generated)
+* Update Roslyn to 4.9.0-1.23530.4 (PR: [#6603](https://github.com/dotnet/vscode-csharp/pull/6603))
+  * Enable NuGet restore commands `dotnet.restore.all` and `dotnet.restore.project` (PR: [#70588](https://github.com/dotnet/roslyn/pull/70588))
+  * Fix issue where server did not reload projects after NuGet restore (PR: [#70602](https://github.com/dotnet/roslyn/pull/70602))
+
 ## Latest
 * Update Roslyn to 4.9.0-1.23525.5 (PR: [#6595](https://github.com/dotnet/vscode-csharp/pull/6595))
   * Fix some project loading issues caused by evaluation failures (PR: [#70496](https://github.com/dotnet/roslyn/pull/70496))

package.json

@@ -37,7 +37,7 @@
     }
   },
   "defaults": {
-    "roslyn": "4.9.0-1.23525.5",
+    "roslyn": "4.9.0-1.23530.4",
     "omniSharp": "1.39.10",
     "razor": "7.0.0-preview.23516.2",
     "razorOmnisharp": "7.0.0-preview.23363.1",