Update README for accurate terminology

Corrected 'mounted drives' to 'mounted PSDrives' for accuracy.

Author: yotsuda

README.md

@@ -34,7 +34,7 @@ This minimalist architecture provides maximum flexibility while maintaining simp
 **🔄 Persistent Session State**
 - Current directory persists across all commands and interactions
 - Imported modules and authenticated sessions remain active throughout the entire session
-- Variables, functions, and mounted drives stay available throughout the session
+- Variables, functions, and mounted PSDrives stay available throughout the session
 - No need to re-initialize or re-authenticate between commands
 - True model context protocol implementation preserves your entire working state