Extention download incorrect omnisharp version for .Net 9.0 for linux

## Environment data
`dotnet --info` output:
```
VS Code version: 1.102.3
.NET SDK:
Version: 9.0.203
Commit: dc7acfa194
Workload version: 9.0.200-manifests.9df47798
MSBuild version: 17.13.20+a4ef1e90f

Runtime Environment:
OS Name: ubuntu
OS Version: 22.04
OS Platform: Linux
RID: linux-x64
Base Path: /usr/share/dotnet/sdk/9.0.203/

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
Version: 9.0.4
Architecture: x64
Commit: f57e6dc747

.NET SDKs installed:
6.0.428 [/usr/share/dotnet/sdk]
9.0.203 [/usr/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 9.0.4 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 9.0.4 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
```

Visual code installled on windows machine and connected to .Net project by ssh.

Extention C# downloaded omnisharp version for .Net 6.
```
~/.vscode-server/extensions/ms-dotnettools.csharp-2.87.31-linux-x64/.omnisharp$ ls
1.39.12 1.39.12-net6.0
```

I see logs error in output for Omnisharp:

```
OmniSharp server started with .NET 9.0.203
(/usr/share/dotnet).
Path:/.vscode-server/extensions/ms-dotnettools.csharp-2.87.31-linux-x64/.omnisharp/1.39.12-net6.0/OmniSharp.dll
PID: 4179788

[STDERR] Could not execute because the specified command or file was not found.
```

I provided all values for my workspace visual code settings.json file, but it didn't help:

```
{
"omnisharp.dotnetPath": "/usr/share/dotnet",
"omnisharp.sdkPath": "/usr/share/dotnet/sdk/9.0.203",
"omnisharp.sdkVersion": "9.0.203",
"omnisharp.useModernNet": true
}
```