Updated README and Jupyterbook links

Author: lyubolp

README.md

@@ -49,7 +49,7 @@ JupyterBook "книжка" с всички теми има тук: https://fmipy
 |3  | 13.11.2023 | 5              | [Задачи](https://github.com/fmipython/PythonCourse2023/blob/master/labs/lab03.md),[Примерни решения](https://github.com/fmipython/PythonCourse2023/blob/master/labs/lab03_solutions.ipynb)|
 |4  | 27.11.2023 | 6, 7, 8        | [Задачи](https://github.com/fmipython/PythonCourse2023/blob/master/labs/lab04.ipynb),[Примерни решения](https://github.com/fmipython/PythonCourse2023/blob/master/labs/lab04_solutions.ipynb)|
 |5  | 14.12.2023 | 9, 10, 11, 12  | [Задачи](https://github.com/fmipython/PythonCourse2023/tree/master/labs/lab05), [Примерни решения]()|
-|6  | 8.1.2024   | 13, 14         | |
+|6  | 8.1.2024   | 13, 14         | [Задачи](https://github.com/fmipython/PythonCourse2023/tree/master/labs/lab06.md)|
 |7  | 18.1.2024  | 15, 16, 17     | |
 
 Освен на тези дати, възможно е да се решават задачи и ако остане време след някои лекции.

_toc.yml

@@ -36,6 +36,8 @@ parts:
     title: Упражнение 4 (теми 6, 7 & 8)
   - file: labs/lab05/README
     title: Упражнение 5 (теми 9, 10, 11 & 12)
+  - file: labs/lab06
+    title: Упражнение 6 (теми 13 и 14)
 
 - caption: Упражнения (примерни решения)
   chapters: