fix: related to #8653

[VaclavElias]

This is a follow up issue. With this fix, docfx generates docs. I hope it is not going to cause any side effects.

Also fixes #8653

docfx/src/Microsoft.DocAsCode.Dotnet/SymbolFormatter.cs

Lines 152 to 168 in 463a4ef

	try
	{
	var result = language switch
	{
	SyntaxLanguage.VB => VB.SymbolDisplay.ToDisplayParts(symbol, format),
	_ => CS.SymbolDisplay.ToDisplayParts(symbol, format),
	};
	if (overload && language is SyntaxLanguage.CSharp && symbol.IsCastOperator())
	return GetCastOperatorOverloadDisplayParts(result);
	return result;
	}
	catch
	{
	return ImmutableArray<SymbolDisplayPart>.Empty;
	}

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01 ⚠️

Comparison is base (7831dfa) 76.74% compared to head (6702005) 76.74%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8658      +/-   ##
==========================================
- Coverage   76.74%   76.74%   -0.01%     
==========================================
  Files         607      607              
  Lines       25054    25057       +3     
==========================================
+ Hits        19228    19230       +2     
- Misses       5826     5827       +1     

Impacted Files	Coverage Δ
...crosoft.DocAsCode.Dotnet/SymbolFormatter.Syntax.cs	97.18% <100.00%> (+0.03%)	⬆️

... and 3 files with indirect coverage changes

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