fix: move ASCII art outside center div to prevent alignment issues

Author: us

README.md

@@ -1,5 +1,3 @@
-<div align="center">
-
 ```
      .---.
     |o   o|    null-e
@@ -9,6 +7,8 @@
      /| |\
 ```
 
+<div align="center">
+
 # null-e
 
 **Disk cleanup CLI for developers — clean node_modules, target, .venv, Docker, Xcode caches and 50+ cache types**