Remove [DebuggerDisplay] from Paragraph

The `_text` field no longer exists, so hovering over instances in the debugger just shows an error message.

src/Spectre.Console/Widgets/Paragraph.cs

@@ -4,7 +4,6 @@ namespace Spectre.Console;
 /// A paragraph of text where different parts
 /// of the paragraph can have individual styling.
 /// </summary>
-[DebuggerDisplay("{_text,nq}")]
 public sealed class Paragraph : Renderable, IHasJustification, IOverflowable
 {
     private readonly List<SegmentLine> _lines;
@@ -281,4 +280,4 @@ private List<SegmentLine> SplitLines(int maxWidth)
 
         return lines;
     }
-}
+}