update dictionary and spelling

Author: HomelessDinosaur

dictionary.txt

@@ -204,6 +204,7 @@ href
 colour
 preflight
 nav
+MacOS
 
 ^.+[-:_]\w+$
 [a-z]+([A-Z0-9]|[A-Z0-9]\w+)

src/pages/guides/dart/flutter.mdx

@@ -9,7 +9,7 @@ Flutter is an open-source development framework developed by Google for developi
 
 Cross-platform development has become increasingly important due to the growing demand for mobile apps, cost savings, and increased reach and engagement. By developing an application once using cross-platform technologies like Flutter, companies can reduce development costs, simplify maintenance and updates, and target a broader audience across different platforms, devices, and operating systems.
 
-Cross-platform development often faces criticism regarding performance and native feature access; however, Flutter provides features to achieve high performance while supporting native features. This close-to-native performance is enabled through two key aspects: the open-source programming language Dart, optimized for building UIs by compiling to native machine code; and Flutter's use of Skia, a graphics engine providing consistent rendering across different platforms. This leads to a unified experience for users and developers across various devices.
+Cross-platform development often faces criticism regarding performance and native feature access; however, Flutter provides features to achieve high performance while supporting native features. This close-to-native performance is enabled through two key aspects: the open-source programming language Dart, optimized for building user interfaces by compiling to native machine code; and Flutter's use of Skia, a graphics engine providing consistent rendering across different platforms. This leads to a unified experience for users and developers across various devices.
 
 Flutter further enhances developer experience with widgets - reusable components used to build applications. Developers can customize these widgets using composition, where complex layouts are created from smaller widgets. This approach simplifies the development process and allows for easy customization of user interfaces.