Make the icon scale in TMP_Text adjustable

[eviltwo]

InputGlyphs/InputGlyphs/Assets/InputGlyphs/Scripts/Runtime/Display/TextMeshPro/InputGlyphText.cs

Line 272 in 511c264

var spriteGlyph = new TMP_SpriteGlyph((uint)i, glyphMetrics, glyphRect, 1, i);

Currently, the argument is fixed to "1", but exposing it as a variable would let users adjust it.