fix: resolve UTF-8 encoding error in ML module

- Remove special character from docstring
- Replace 'Cidadão' with 'Cidadao' to avoid encoding issues
- Fixes SyntaxError during module import

src/ml/__init__.py

@@ -1,4 +1,4 @@
-"""Machine Learning models and utilities for Cidad�o.AI.
+"""Machine Learning models and utilities for Cidadao.AI.
 
 This module provides ML capabilities including:
 - Anomaly detection algorithms