docs: Clarify which build files are shipped via npm

- dist/tiny-lru.min.js is available in repo but not packaged for npm
- Only dist/tiny-lru.js, dist/tiny-lru.cjs, and types/lru.d.ts are shipped

Author: avoidwork

README.md

@@ -408,12 +408,13 @@ npm run coverage     # Generate test coverage report
 
 ### Build Output
 
-Build produces multiple module formats:
+Build produces multiple module formats. When you install from npm, you'll get:
 - `dist/tiny-lru.js` - ES Modules
 - `dist/tiny-lru.cjs` - CommonJS
-- `dist/tiny-lru.min.js` - Minified ESM
 - `types/lru.d.ts` - TypeScript definitions
 
+The minified version (`dist/tiny-lru.min.js`) is available in the repository for local testing but is not shipped via npm.
+
 ## Tests
 
 | Metric    | Count |