Clarify aspect-ratio plugin necessity in README (#40)

* Clarify aspect-ratio plugin necessity in README

Updated README to note Tailwind CSS v3.0 aspect-ratio utilities.

* Update readme

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Co-authored-by: Jordan Pittman <jordan@cryptica.me>

Author: danielyuliuss

README.md

@@ -1,3 +1,6 @@
+> [!NOTE]
+> As of Tailwind CSS v3.0, `aspect-ratio` utilities are included in the framework by default and this plugin is no longer required.
+
 # @tailwindcss/aspect-ratio
 
 A plugin that provides a composable API for giving elements a fixed aspect ratio.