Update doc/api/packages.md

Co-authored-by: Antoine du Hamel <[email protected]>

Author: 0hmX

doc/api/packages.md

@@ -465,7 +465,7 @@ Reasons for this behavior include:
 * **Encapsulation:** Ensures all exported paths are resolved relative to
   the package root, making the package self-contained.
 
-#### No path traversal or invalid segments
+##### No path traversal or invalid segments
 
 Export targets must not resolve to a location outside the package's root
 directory. Additionally, path segments like `.` (single dot), `..` (double dot),