Doc: use native markdown for svg title image
@@ -7,7 +7,7 @@ using Go, OpenVPN, iptables, DNS over TLS, ShadowSocks and an HTTP proxy*
**ANNOUNCEMENT**:
-<img height="250" src="https://raw.githubusercontent.com/qdm12/gluetun/master/title.svg?sanitize=true">
+![Title image](https://raw.githubusercontent.com/qdm12/gluetun/master/title.svg)
[![Size](https://img.shields.io/docker/image-size/qmcgaw/gluetun?sort=semver&label=Last%20released%20image)](https://hub.docker.com/r/qmcgaw/gluetun/tags?page=1&ordering=last_updated)
[![Size](https://img.shields.io/docker/image-size/qmcgaw/gluetun/latest?label=Latest%20image)](https://hub.docker.com/r/qmcgaw/gluetun/tags)
