Fix unclosed code fence: close directory tree block before signature

Author: fxmedus

README.md

@@ -102,10 +102,10 @@ data/raw/
 The diabetes dataset is used exclusively for exploratory analysis and feature engineering demonstration and does not contribute to outcome modeling.
 
 ---
-```text
 
 ## Repository structure
 
+```
 cvd-diabetes-risk-ml/
 │
 ├── data/
@@ -145,6 +145,7 @@ cvd-diabetes-risk-ml/
 ├── README.md
 ├── .gitignore
 └── LICENSE
+```
 
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