Update README.md

Author: aafulei

README.md

@@ -18,8 +18,8 @@ Project website:
 - [Features](#features)
 - [Supported Platforms](#supported-platforms)
 - [Getting Started](#getting-started)
-- [Inside This Repository](#inside-this-repository)
-- [Beyond This Repository](#beyond-this-repository)
+- [Project Structure](#project-structure)
+- [Project Website](#project-website)
 - [Author](#author)
 - [License](#license)
 - [Version](#version)
@@ -128,7 +128,7 @@ to view the manual page for more information.
 *For detailed user guides, please visit the project website
  [**aafulei.github.io/cpp-today**](https://aafulei.github.io/cpp-today).*
 
-## Inside This Repository
+## Project Structure
 
 - [`.github/workflows/`](./.github/workflows/) — GitHub Actions workflows
 - [`docs/`](./docs/) — project documentation files and assets
@@ -151,7 +151,7 @@ to view the manual page for more information.
 - [`compile_flags.txt`](./compile_flags.txt) — Clangd compile options
 - [`mkdocs.yml`](./mkdocs.yml) — MkDocs project website configuration
 
-## Beyond This Repository
+## Project Website
 
 ![](./docs/img/project.png)
 
@@ -179,5 +179,5 @@ MIT
 
 ## Changelog
 
-For detailed version updates, please see the [`CHANGELOG.md`](CHANGELOG.md).
+For detailed version updates, please see the [CHANGELOG](./CHANGELOG.md).