[DebuggerDisplay] attribute on Paragraph is broken

[martincostello]

Information

• OS: N/A
• Version: 0.48.0
• Terminal: N/A

Describe the bug

The [DebuggerDisplay] attribute on Paragraph references a field that no longer exists:

spectre.console/src/Spectre.Console/Widgets/Paragraph.cs

Lines 7 to 8 in 8da05bc

	[DebuggerDisplay("{_text,nq}")]
	public sealed class Paragraph : Renderable, IHasJustification, IOverflowable

This causes an error message to be rendered in a debugger if inspecting a Paragraph instance.

To Reproduce

View an instance of Paragraph in a debugger such as Visual Studio.

Expected behavior

No error is shown.

Screenshots

[martincostello]

Opened #1477 to remove the attribute as there appears to be no member that is a trivial equivalent.