✏️ Fixing typo

Author: sandoche

csharp/README.md

@@ -6,6 +6,6 @@ List of covered sections:
 * [Interface Naming](../csharp/interface-naming.md)
 * [Method Naming](../csharp/method-naming.md)
 * [Variable Naming](../csharp/variable-naming.md)
-* [Namespace Naming](../csharp/namespaces-naming.md)
+* [Namespaces Naming](../csharp/namespaces-naming.md)
 
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