Update readme.md

<div align="center">

[![build_img]][build_url]

[![gh_last_release_svg]][qemu-ghcr]

[![Docker Image Size]][qemu-ghcr]

[![Build]][build_url]

[![Version]][ghcr_url]

[![Size]][ghcr_url]

[build_url]: https://github.com/qemu-tools/qemu-docker/

[qemu-ghcr]: https://github.com/orgs/qemu-tools/packages/container/package/qemu-docker

[ghcr_url]: https://github.com/orgs/qemu-tools/packages/container/package/qemu-docker

[build_img]: https://github.com/qemu-tools/qemu-docker/actions/workflows/build.yml/badge.svg

[Docker Image Size]: https://ghcr-badge.deta.dev/qemu-tools/qemu-docker/size?color=%23066da5

[gh_last_release_svg]: https://ghcr-badge.deta.dev/qemu-tools/qemu-docker/tags?n=1&label=version&color=%23066da5&ignore=latest

[Build]: https://github.com/qemu-tools/qemu-docker/actions/workflows/build.yml/badge.svg

[Size]: https://ghcr-badge.deta.dev/qemu-tools/qemu-docker/size?color=%23066da5

[Version]: https://ghcr-badge.deta.dev/qemu-tools/qemu-docker/tags?n=1&label=version&color=%23066da5&ignore=latest

</div></h1>

QEMU in a docker container using KVM acceleration.