doc(pubspec): better description

Author: rafamizes

pubspec.yaml

@@ -1,5 +1,5 @@
 name: flutter_brand_palettes
-description: A collection of elegant and declarative classes for the color palettes and official logos of popular brands and companies.
+description: A collection of elegant and declarative classes for the color palettes of popular brands and companies.
 version: 0.3.4
 homepage: https://dartoos.dev
 repository: https://github.com/dartoos-dev/flutter_brand_palettes