Update FAQ entry on config/launch.py files

Clarified the FAQ regarding old config/launch.py files.

Author: afxalz

docs/FAQ.md

@@ -3,5 +3,5 @@ title: FAQ
 ---
 
 # Frequently Asked Questions
-**I still see old config/launch.py (yaml/py) files even after I edited them in my packages?**
+### I still see old config/launch.py (yaml/py) files even after I edited them in my packages?
 In ROS2, the config (yaml) and launch.py (python) files are copied to the `install` directory of your workspace during the install phase of your build process. You can verify this by looking at the `install()` functions inside the `CmakeLists.txt` file of your package. So, if you edit the config (yaml) or launch.py (python) files, you need to run the `colcon build` command to copy the modified files to the `install` directory.