docs: fix text decoration

Author: kenjis

user_guide_src/source/outgoing/view_cells.rst

@@ -119,7 +119,7 @@ At the most basic level, all you need to implement within the class are public p
 Generating Cell via Command
 ===========================
 
-You can also create a controlled cell via a built in command from the CLI. The command is ``php spark make:cell``. It takes one argument, the name of the cell to create. The name should be in PascalCase, and the class will be created in the ``app/Cells`` directory. The view file will also be created in the ``app/Cells`` directory.
+You can also create a controlled cell via a built in command from the CLI. The command is ``php spark make:cell``. It takes one argument, the name of the cell to create. The name should be in PascalCase, and the class will be created in the **app/Cells** directory. The view file will also be created in the **app/Cells** directory.
 
 ::