fix editorconfig violation

[yaito3014]

Running editorconfig-checker, it emits:

WindowsDesktop/App/engine/shader/d3d11/2d.hlsl:
        73: Trailing whitespace
WindowsDesktop/App/engine/shader/d3d11/fullscreen_triangle.hlsl:
        26-28: Wrong indentation type(spaces instead of tabs)

2 errors found

siv8/WindowsDesktop/App/engine/shader/d3d11/2d.hlsl

Lines 72 to 74 in 97c5b78

	}
	float4 s3d_patternBackgroundColor()

siv8/WindowsDesktop/App/engine/shader/d3d11/fullscreen_triangle.hlsl

Lines 24 to 32 in 97c5b78

	result.position = float4((id == 2 ? 3.0 : -1.0),
	(id == 1 ? 3.0 : -1.0),
	0.0,
	1.0);
	result.uv = float2((id == 2 ? 2.0 : 0.0),
	(id == 1 ? -1.0 : 1.0));
	return result;