[FTD#16][CHANGE] banner img

Author: jay-k98

README.md

@@ -1,5 +1,4 @@
-![Flutter Text Decorator Logo][logo_white]
-![Flutter Text Decorator Logo][logo_black]
+![Flutter Text Decorator Logo][logo_banner]
 
 [![License: MIT][license_badge]][license_link]
 [![style: very good analysis][very_good_analysis_badge]][very_good_analysis_link]
@@ -110,8 +109,7 @@ Authors:
 ## License
 This project is licensed under the MIT License - see the [LICENSE](./LICENSE) file for details.
 
-[logo_black]: ./documentation/img/flutter_text_decorator_logo_light.png#gh-light-mode-only
-[logo_white]: ./documentation/img/flutter_text_decorator_logo_dark.png#gh-dark-mode-only
+[logo_banner]: ./documentation/img/flutter_text_decorator_banner.png
 [license_link]: https://opensource.org/licenses/MIT
 [license_badge]: https://img.shields.io/badge/license-MIT-blue.svg
 [very_good_analysis_badge]: https://img.shields.io/badge/style-very_good_analysis-B22C89.svg