Update README.md

Author: squirelboy360

README.md

@@ -57,11 +57,9 @@ try {
 
 ### Screenshots
 
-#### iOS Color Picker
-![iOS Color Picker](assets/iphone.png)
+<img src="https://github.com/squirelboy360/flutter-native-color-picker-plugin/blob/main/assets/iphone.png" width="300" alt="iOS Color Picker"/>
 
-#### macOS Color Picker
-![macOS Color Picker](assets/macos.png)
+<img src="https://github.com/squirelboy360/flutter-native-color-picker-plugin/blob/main/assets/macos.png" width="300" alt="macOS Color Picker"/>
 
 ### Using with ColorModel
 
@@ -125,4 +123,4 @@ Contributions are welcome! If you find a bug or want to add a feature, please fe
 
 ## License
 
-This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.