docs: update .clinerules to use full project name

Author: uhyo

.clinerules

@@ -1,6 +1,6 @@
 # Project Structure
 
-This project, better-ts-lib, is a project that provides an alternative to TypeScript's standard library. The main ingredients of this project are in the `lib/` directory which contains incremental differences to the standard library.
+This project, better-typescript-lib, is a project that provides an alternative to TypeScript's standard library. The main ingredients of this project are in the `lib/` directory which contains incremental differences to the standard library.
 
 This project is structured differently from ordinary TypeScript projects. Carefully read CONTRIBUTING.md to understand how to modify the type definitions, how to build the project, and how to test the project.