[Bug]: Top-level brace-scoped `using` declaration with object initializer containing `string` collection initializer with `;`, `{`, or `}` tokens in items break brace highlighting

Issue Description

This seems to be an edge case that has not been noticed.
In a top-level file, a brace-scoped using declaration with an object initialized which contains a collection initializer containing strings will break brace highlighting if any of the strings contain a ;, {, }, or // (maybe others?) token.

Steps to Reproduce

Open a top-level C# file.

using MyClass braceScopedInstance = new() // Target-typed or not does not appear to matter.
{
    Strings = { ";" } // <~ Brace highlighting starts breaking here.
};

class MyClass : IDisposable
{
    public List<string> Strings { get; }

    public void Dispose() { }
}

Expected Behavior

Brace highlighting continues to be correct.

Actual Behavior

Visual Studio Code highlights the closing braces after the ";" incorrectly. It also believes that the first opening brace does not have a closing match.

The behavior is slightly different for {, } and // tokens.

The expected behavior happens when the code is within any kind of scope:

// Something as simple as this in the top-level file is enough.
{
    using MyClass braceScopedInstance = new()
    {
        Strings = { ";" } // Brace highlighting is correct.
    };
}

Environment information

VSCode version: 1.85.2 C# Extension: 2.15.30 Using OmniSharp: false

Dotnet Information

``` .NET SDK: Version: 8.0.100-rc.2.23502.2 Commit: 0abacfc2b6 Runtime Environment: OS Name: Windows OS Version: 10.0.22631 OS Platform: Windows RID: win-x64 Base Path: C:\Program Files\dotnet\sdk\8.0.100-rc.2.23502.2\ .NET workloads installed: [wasi-experimental] Installation Source: SDK 8.0.100-rc.2 Manifest Version: 8.0.0-rc.2.23479.6/8.0.100-rc.2 Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.workload.mono.toolchain.current\8.0.0-rc.2.23479.6\WorkloadManifest.json Install Type: Msi Host: Version: 8.0.0-rc.2.23479.6 Architecture: x64 Commit: 0b25e38ad3 .NET SDKs installed: 8.0.100-rc.2.23502.2 [C:\Program Files\dotnet\sdk] .NET runtimes installed: Microsoft.AspNetCore.App 8.0.0-rc.2.23480.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 7.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 8.0.0-rc.2.23479.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 8.0.0-rc.2.23479.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Other architectures found: None Environment variables: Not set global.json file: Not found Learn more: https://aka.ms/dotnet/info Download .NET: https://aka.ms/dotnet/download ```

Visual Studio Code Extensions

|Extension|Author|Version|Folder Name| |---|---|---|---| |csdevkit|ms-dotnettools|1.3.6|ms-dotnettools.csdevkit-1.3.6-win32-x64| |csharp|ms-dotnettools|2.15.30|ms-dotnettools.csharp-2.15.30-win32-x64| |vscode-dotnet-runtime|ms-dotnettools|2.0.1|ms-dotnettools.vscode-dotnet-runtime-2.0.1| |vscodeintellicode-csharp|ms-dotnettools|0.1.26|ms-dotnettools.vscodeintellicode-csharp-0.1.26-win32-x64|;

dotnet / vscode-csharp