Add UX design resource (#7710)

* Update conceptual-design@r6D07cN0Mg4YXsiRSrl1_.md

I have added an article by Dan Nessler on How to apply a design thinking, HCD, UX or any creative process from scratch which is a how-to article aims at providing designers, creative thinkers or even project managers with a tool to set up, frame, organise, structure, run or manage design challenges, and projects: The Double Diamond revamped.

* Update conceptual-design@r6D07cN0Mg4YXsiRSrl1_.md

I have added an article by Dan Nessler on How to apply a design thinking, HCD, UX or any creative process from scratch which is a how-to article aims at providing designers, creative thinkers or even project managers with a tool to set up, frame, organise, structure, run or manage design challenges, and projects: The Double Diamond revamped.

src/data/roadmaps/ux-design/content/conceptual-design@r6D07cN0Mg4YXsiRSrl1_.md

@@ -18,3 +18,7 @@ Key components of conceptual design include:
 - **Iteration**: Continually refine and iterate on the initial concept, using feedback from user testing and stakeholder input to make informed design adjustments. This iterative approach allows for flexibility and adaptability as the project progresses.
 
 Ultimately, the goal of conceptual design is to create a coherent and engaging vision that meets user needs and aligns with business objectives. By investing time and effort into this foundational stage, designers can lay the groundwork for a successful and enjoyable user experience.
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+Visit the following resources to learn more:
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+- [@article@How to apply design thinking in UX](https://medium.com/digital-experience-design/how-to-apply-a-design-thinking-hcd-ux-or-any-creative-process-from-scratch-b8786efbf812)