Update README.md

Author: xtr0py

README.md

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 [![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/xtr0py/dnscrypt-proxy-2-docker.svg)](https://hub.docker.com/r/xtr0py/dnscrypt-proxy-2-docker)
-[![MicroBadger Size (tag)](https://img.shields.io/microbadger/image-size/xtr0py/dnscrypt-proxy-2-docker/latest.svg)](https://hub.docker.com/r/xtr0py/dnscrypt-proxy-2-docker)
+![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/xtr0py/dnscrypt-proxy-2-docker)
 [![Docker Pulls](https://img.shields.io/docker/pulls/xtr0py/dnscrypt-proxy-2-docker.svg)](https://hub.docker.com/r/xtr0py/dnscrypt-proxy-2-docker)
 
 This is a Docker image containing [DNSCrypt Proxy 2.x](https://github.com/jedisct1/dnscrypt-proxy). You can use this to set up a DNS server on your local network which resolves queries using DNSCrypt or DNS-over-HTTPS (DoH) rather than sending plaintext DNS queries over the Internet.