Updated README.md

Author: FrancescoSaverioZuppichini

README.md

@@ -41,7 +41,7 @@ We provide two handy commands inside the `Makefile`, namely:
 - `make style` to format the code
 - `make check_code_quality` to check code quality (PEP8 basically)
 
-So far, **there is no linting with mypy`. See [issue](link) 
+So far, **there is no types checking with mypy**. See [issue](https://github.com/roboflow-ai/template-python/issues/4). 
 
 ### Tests 🧪