Update navigation toggle name
This updates the navigation toggle component & directory name to match our GitLab naming convention.
nav-toggle/NavigationToggle.vue
--> navigation_toggle/navigation_toggle.vue
Documentation for naming conventions will be addressed in gitlab#21512, but we should at least keep the naming of directories and components consistent with the current GitLab codebase.
Edited by 🤖 GitLab Bot 🤖