Remove broken link

src/roadmaps/backend/content/115-architectural-patterns/105-service-mesh.md

@@ -10,5 +10,4 @@ Service meshes are commonly used in cloud-native architectures and are often man
 
 Visit the following resources to learn more:
 
-- [What is a Service Mesh?](https://www.nginx.com/blog/what-is-a-service-mesh/)
-- [Service Mesh Explained - Cloud Native Computing Foundation (CNCF)](https://www.cncf.io/blog/2018/05/02/service-mesh-explained/)
+- [What is a Service Mesh?](https://www.nginx.com/blog/what-is-a-service-mesh/)