doc: use lower case for "cloud native" (#4792)

Fixed upper case letter typo

Signed-off-by: mudit singh <[email protected]>

Author: mudit-01

README.md

@@ -6,7 +6,7 @@
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/openservicemesh/osm/blob/main/LICENSE)
 [![release](https://img.shields.io/github/release/openservicemesh/osm/all.svg)](https://github.com/openservicemesh/osm/releases)
 
-Open Service Mesh (OSM) is a lightweight, extensible, Cloud Native [service mesh][1] that allows users to uniformly manage, secure, and get out-of-the-box observability features for highly dynamic microservice environments.
+Open Service Mesh (OSM) is a lightweight, extensible, cloud native [service mesh][1] that allows users to uniformly manage, secure, and get out-of-the-box observability features for highly dynamic microservice environments.
 
 The OSM project builds on the ideas and implementations of many cloud native ecosystem projects including [Linkerd](https://github.com/linkerd/linkerd), [Istio](https://github.com/istio/istio), [Consul](https://github.com/hashicorp/consul), [Envoy](https://github.com/envoyproxy/envoy), [Kuma](https://github.com/kumahq/kuma), [Helm](https://github.com/helm/helm), and the [SMI](https://github.com/servicemeshinterface/smi-spec) specification.