Update auto-layout@j2BL0sf3WjnJZZWa7cCjy.md (#6037)

* Update auto-layout@j2BL0sf3WjnJZZWa7cCjy.md

* Update src/data/roadmaps/ios/content/auto-layout@j2BL0sf3WjnJZZWa7cCjy.md

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Co-authored-by: dsh <daniel.s.holdsworth@gmail.com>

src/data/roadmaps/ios/content/auto-layout@j2BL0sf3WjnJZZWa7cCjy.md

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-# Auto layout
+# Auto layout
+
+Auto Layout dynamically calculates the size and position of all the views in your view hierarchy, based on constraints placed on those views. For example, you can constrain a button so that it is horizontally centered with an Image view and so that the button’s top edge always remains 8 points below the image’s bottom. If the image view’s size or position changes, the button’s position automatically adjusts to match.
+
+Learn more from the following resources:
+
+[@official@Understanding Auto Layout](https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/AutolayoutPG/index.html)