Note the halved loca offsets in the batch bounds reader

The short loca format stores every offset divided by two, which is why the
batch reader doubles what it reads. LocaTable's single-glyph path already
carries that note; the inline decode in the batch path did not.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: Gillibald

src/Avalonia.Base/Media/Fonts/Tables/Glyf/GlyfTable.cs

@@ -196,6 +196,7 @@ public void GetGlyphBounds(ReadOnlySpan<ushort> glyphIndices, Span<GlyphBounds>
 
                 if (shortFormat)
                 {
+                    // Short format: uint16 values stored divided by 2
                     start = BinaryPrimitives.ReadUInt16BigEndian(loca.Slice(locaOffset)) * 2;
                     end = BinaryPrimitives.ReadUInt16BigEndian(loca.Slice(locaOffset + 2)) * 2;
                 }