🐛 Fixing broken link

Author: sandoche

SUMMARY.md

@@ -11,6 +11,7 @@
   * [Interface Naming](csharp/interface-naming.md)
   * [Method Naming](csharp/method-naming.md)
   * [Variable Naming](csharp/variable-naming.md)
+  * [Namespaces Naming](csharp/namespaces-naming.md)
 * [Git](git/README.md)
   * [Branch Naming](git/branch-naming.md)
   * [Commit Message Naming](git/commit-message-naming.md)

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/namespace-naming.md)
+* [Namespace Naming](../csharp/namespaces-naming.md)
 
 Missing something? Please contribute here by reading [this guide](../docs/CONTRIBUTING.md).