doc: add download badge to README

Signed-off-by: Pierre-Henri Symoneaux <[email protected]>

Author: phsym

README.md

@@ -1,6 +1,5 @@
 # okms-cli
-[![build](https://github.com/ovh/okms-cli/actions/workflows/main-branch.yaml/badge.svg?branch=main)](https://github.com/ovh/okms-cli/actions/workflows/main-branch.yaml)
-[![license](https://img.shields.io/badge/license-Apache%202.0-red.svg?style=flat)](https://raw.githubusercontent.com/ovh/okms-sdk-go/master/LICENSE) [![Go Report Card](https://goreportcard.com/badge/github.com/ovh/okms-cli)](https://goreportcard.com/report/github.com/ovh/okms-cli)
+[![build](https://github.com/ovh/okms-cli/actions/workflows/main-branch.yaml/badge.svg?branch=main)](https://github.com/ovh/okms-cli/actions/workflows/main-branch.yaml) [![license](https://img.shields.io/badge/license-Apache%202.0-red.svg?style=flat)](https://raw.githubusercontent.com/ovh/okms-sdk-go/master/LICENSE) [![Go Report Card](https://goreportcard.com/badge/github.com/ovh/okms-cli)](https://goreportcard.com/report/github.com/ovh/okms-cli) [![Download Count](https://img.shields.io/github/downloads/ovh/okms-cli/total.svg)](https://github.com/ovh/okms-cli/releases/latest)
 
 The CLI to interact with your [OVHcloud KMS](https://help.ovhcloud.com/csm/en-ie-kms-quick-start?id=kb_article_view&sysparm_article=KB0063362) services.
 It supports both REST API and KMIP protocol.