Update money/README.md

Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>

money/README.md

@@ -2,7 +2,7 @@
 title: "Money Pattern in Java: Encapsulating Monetary Values with Currency Consistency"
 shortTitle: Money
 description: "Learn how the Money design pattern in Java ensures currency safety, precision handling, and maintainable financial operations. Explore examples, applicability, and benefits of the pattern."
-category: Finance
+category: Behavioral
 language: en
 tag:
   - Encapsulation