docs: Add CSM CallBack usage to Name method

[eriklimakc]

GitHub Issue (If applicable): closes #

PR Type

What kind of change does this PR introduce?

• Documentation content changes

What is the new behavior?

Adds an example of how to use the .Name method with a callback.

[agneszitte]

@Mergifyio backport release/stable/4.1

[mergify]

backport release/stable/4.1

✅ Backports have been created

• #2342 docs: Add CSM CallBack usage to Name method (backport #2279) has been created for branch release/stable/4.1

[eriklimakc]

uno.extensions/doc/Learn/Markup/DependencyPropertyBuilder.md

Lines 64 to 70 in deec6a3

	```cs
	new TextBlock()
	.Text(x => x
	.Source("slider")
	.Binding(() => slider.Value)),
	new Slider().Name("slider")
	```

This example should probably be:

new TextBlock()
	.Text(x => x
	         .Source("slider")
	         .Binding<Slider>(slider => slider.Value)),
new Slider().Name("slider"))

@dansiegel Can you confirm please?

cc @agneszitte

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