Update Roslyn

Author: dibarbet

CHANGELOG.md

@@ -8,7 +8,8 @@
 - Debug from .csproj and .sln [#5876](https://github.com/dotnet/vscode-csharp/issues/5876)
 
 ## Latest
-* Update Roslyn version to 4.9.0-1.23478.7 (PR: [#6449](https://github.com/dotnet/vscode-csharp/pull/6449))
+* Update Roslyn version to 4.9.0-1.23502.2 (PR: [#6463](https://github.com/dotnet/vscode-csharp/pull/6463))
+  * Fix issue loading projects on .NET 8 RC2 (PR: [#70196](https://github.com/dotnet/roslyn/pull/70196))
   * Fix exception thrown by outdated version of ExternalAccess.RazorCompiler.dll (PR: [#70716](https://github.com/dotnet/roslyn/pull/70176))
   * Fix crash when navigating to .NET Framework reference assemblies (PR: [#69936](https://github.com/dotnet/roslyn/pull/69936))
   * Fix error when only the invariant culture is available (PR: [#70096](https://github.com/dotnet/roslyn/pull/70096))

package.json

@@ -37,7 +37,7 @@
     }
   },
   "defaults": {
-    "roslyn": "4.9.0-1.23478.7",
+    "roslyn": "4.9.0-1.23502.2",
     "omniSharp": "1.39.7",
     "razor": "7.0.0-preview.23475.5",
     "razorOmnisharp": "7.0.0-preview.23363.1"