workflow: fix docker beta tag for arm64

Author: ayufan

README.md

@@ -1,7 +1,7 @@
 # Proxmox Backup Server in a Container
 
 - [![GitHub release (latest by date)](https://img.shields.io/github/v/release/ayufan/pve-backup-server-dockerfiles?label=GitHub%20Release)](https://github.com/ayufan/pve-backup-server-dockerfiles/releases) [![Docker Image Version (latest stable (amd64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/latest?arch=amd64&label=Docker:%20latest)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags) [![Docker Image Version (latest stable (arm64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/latest?arch=arm64&label=Docker:%20latest)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags)
-- [![GitHub release (latest by date including pre-releases)](https://img.shields.io/github/v/release/ayufan/pve-backup-server-dockerfiles?include_prereleases&color=red&label=GitHub%20Pre-Release)](https://github.com/ayufan/pve-backup-server-dockerfiles/releases/latest) [![Docker Image Version (latest stable (amd64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/beta?arch=amd64&color=red&label=Docker:%20beta)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags) [![Docker Image Version (latest stable (arm64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/beta?arch=amd64&color=red&label=Docker:%20beta)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags)
+- [![GitHub release (latest by date including pre-releases)](https://img.shields.io/github/v/release/ayufan/pve-backup-server-dockerfiles?include_prereleases&color=red&label=GitHub%20Pre-Release)](https://github.com/ayufan/pve-backup-server-dockerfiles/releases/latest) [![Docker Image Version (latest stable (amd64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/beta?arch=amd64&color=red&label=Docker:%20beta)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags) [![Docker Image Version (latest stable (arm64))](https://img.shields.io/docker/v/ayufan/proxmox-backup-server/beta?arch=arm64&color=red&label=Docker:%20beta)](https://hub.docker.com/r/ayufan/proxmox-backup-server/tags)
 
 This is an unofficial compilation of Proxmox Backup Server
 to run it in a container for AMD64 and ARM64.