Update input group doc layout

[endigo9740]

Linked Issue

Closes #2230

Description

Updated the input-group docs to showcase the examples in a vertical column rather than a 2x2 grid.

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Latest commit: f1ee159

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Name	Status	Preview	Updated (UTC)
skeleton-docs	✅ Ready (Inspect)	Visit Preview	Dec 20, 2023 10:48pm