fix black README.md

python/code_quality/black/README.md

@@ -14,7 +14,7 @@ configuration files.
 
 See this example:
 
-```python
+```toml
 [tool.black]
 line-length = 100
 ```
@@ -23,7 +23,8 @@ line-length = 100
 
 1. Configure the black section of `pyproject.toml` in your repository's with your desired rules.
 2. Include the Black template in your CI/CD configuration (see quick use above).
-3. Customize the template if it's relevant.
+3. If you need to customize the job, check
+   the [jobs customization](https://docs.r2devops.io/get-started/use-templates/#job-templates-customization).
 
 ## Add a <a href="https://github.com/psf/black"><img alt="Code style: black" src="https://img.shields.io/badge/code%20style-black-000000.svg"></a> badge to your project README.md