Fixed headings order

src/content/resources/language/c-sharp/coding-conventions.md

@@ -8,8 +8,6 @@ external_resources:
     href: "https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions"
 ---
 
-## Naming conventions
-
 Coding conventions serve the following purposes:
 
 - They create a consistent look to the code, so that readers can focus on content, not layout.
@@ -17,6 +15,8 @@ Coding conventions serve the following purposes:
 - They facilitate copying, changing, and maintaining the code.
 - They demonstrate C# best practices.
 
+## Naming conventions
+
 ### Pascal case
 
 Use pascal casing ("PascalCasing") when naming a class, record, interface or struct.