Update organize/mintignore.mdx (#2632)

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: mintlify[bot]

organize/mintignore.mdx

@@ -36,14 +36,18 @@ Excluded files:
 
 ## Default ignored patterns
 
-Mintlify automatically ignores the following directories without requiring any configuration:
+Mintlify automatically ignores the following directories and files without requiring any configuration:
 
 - `.git`
 - `.github`
 - `.claude`
 - `.agents`
 - `.idea`
 - `node_modules`
+- `README.md`
+- `LICENSE.md`
+- `CHANGELOG.md`
+- `CONTRIBUTING.md`
 
 You don't need to add these to your `.mintignore` file.