[vector_graphic] docs: corrected width/height description in VectorGraphic

[eflat64]

Corrected the documentation for width and height parameters in the VectorGraphic widget.

Fixes flutter/flutter#184116

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[gemini-code-assist]

Code Review

This pull request updates the vector_graphics package version to 1.1.21 and refines the documentation for the width and height parameters of the VectorGraphic widget. Feedback suggests further clarifying this documentation to describe behavior in both constrained and unconstrained environments for improved precision.

[gemini-code-assist]

This documentation is an improvement for unconstrained scenarios, but it could be more precise about behavior in constrained environments. To avoid ambiguity, it's helpful to mention both cases, similar to how Flutter's Image widget is documented.

Suggested change

	/// the vector graphic will take the width of the graphic.
	/// the graphic will be sized to its parent's constraints, or to its
	/// intrinsic width if unconstrained.

[gemini-code-assist]

Similar to the width property, this documentation could be more precise by describing the behavior for both constrained and unconstrained environments.

Suggested change

	/// the vector graphic will take the height of the graphic.
	/// the graphic will be sized to its parent's constraints, or to its
	/// intrinsic height if unconstrained.