Change repo tabs to a proper list

Author: taylorarndt

docs/01-understanding-github-web-structure.md

@@ -70,7 +70,15 @@ Visually, the top bar contains (left to right):
 
 When you are inside a repository, a second navigation bar appears below the global bar. This contains the repository's tabs:
 
-`Code` - `Issues` - `Pull requests` - `Actions` - `Projects` - `Wiki` - `Security` - `Insights` - `Settings`
+- Code
+- Issues
+- Pull requests
+- Actions
+- Projects
+- Wiki
+- Security
+- Insights
+- Settings
 
 **Screen reader landmark:** This is labeled **"Repository navigation"**. Press `D` to jump to it directly.