Fix grammar error on (#6440)

docs/en/concepts-and-designs/service-mesh-probe.md

@@ -10,7 +10,7 @@ such as A/B testing, canary releases, rate limiting, access control, and end-to-
 
 ## Where does the probe collect data from?
 Istio is a very typical Service Mesh design and implementor. It defines **Control Panel** and **Data Panel**,
-which are wide used. Here is Istio Architecture:
+which are widely used. Here is Istio Architecture:
 
 ![Istio Architecture](https://istio.io/latest/docs/ops/deployment/architecture/arch.svg)