The intellisense icon for method parameters maybe wrong.

[zhyy2008z]

Issue Type: Bug

The icon for method parameters should be this:

But currently is this:

I have tested all of recently versions, this bug begins at version 1.23.2.

Please help, thanks!

Extension version: 1.23.8
VS Code version: Code 1.52.1 (ea3859d4ba2f3e577a159bc91e3074c5d85c0523, 2020-12-16T16:34:46.910Z)
OS version: Windows_NT x64 10.0.19042

reference to: dotnet/vscode-csharp#4314

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4930K CPU @ 3.40GHz (12 x 3400)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.92GB (9.10GB free)
Process Argv	--crash-reporter-id de657662-233b-4886-99b7-5ea305a102d2
Screen Reader	no
VM	0%

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