Fix casing and remove extraneous "-" from introduction.md

Author: Mersant

content/introduction.md

@@ -8,7 +8,7 @@ Nest provides a level of abstraction above these common Node.js frameworks (Expr
 
 #### Philosophy
 
-In recent years, thanks to Node.js, JavaScript has become the “lingua franca” of the web for both front and backend applications. This has given rise to awesome projects like [Angular](https://angular.dev/), [React](https://github.com/facebook/react) and [Vue](https://github.com/vuejs/vue), which improve developer productivity and enable the creation of fast, testable, and extensible frontend applications. However, while plenty of superb libraries, helpers, and tools exist for Node (and server-side JavaScript), none of them effectively solve the main problem of - **Architecture**.
+In recent years, thanks to Node.js, JavaScript has become the “lingua franca” of the web for both front and backend applications. This has given rise to awesome projects like [Angular](https://angular.dev/), [React](https://github.com/facebook/react) and [Vue](https://github.com/vuejs/vue), which improve developer productivity and enable the creation of fast, testable, and extensible frontend applications. However, while plenty of superb libraries, helpers, and tools exist for Node (and server-side JavaScript), none of them effectively solve the main problem of **architecture**.
 
 Nest provides an out-of-the-box application architecture which allows developers and teams to create highly testable, scalable, loosely coupled, and easily maintainable applications. The architecture is heavily inspired by Angular.