Update README.md

Author: BirjuVachhani

README.md

@@ -1,4 +1,5 @@
-![Banner](https://raw.githubusercontent.com/hyper-designed/box_transform/main/docs/assets/banner.png)
+<img width="100%" alt="banner" width="200px" src="https://raw.githubusercontent.com/hyper-designed/box_transform/main/docs/assets/banner.png#gh-light-mode-only" />
+<img width="100%" alt="banner" width="200px" src="https://raw.githubusercontent.com/hyper-designed/box_transform/main/docs/assets/banner_dark.png#gh-dark-mode-only" />
 
 # Box Transform
 
@@ -91,4 +92,4 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 [docsite]: https://boxtransform.hyperdesigned.dev/
 [demo]: https://boxtransform-demo.hyperdesigned.dev
 [get-started]: https://boxtransform.hyperdesigned.dev/flutter_get_started
-[github]: https://github.com/hyper-designed/box_transform
+[github]: https://github.com/hyper-designed/box_transform