fix: caddy, cloudflared, coredns do not yet work with go-1.21 so pin …

[rawlingsj]

…to 1.20

fixes #4437

[github-actions]

Package coredns: Click to expand/collapse

Package coredns:
Modified: /usr/bin/coredns

Package caddy: Click to expand/collapse

Package caddy:
Modified: /usr/bin/caddy

Package caddy-man: Click to expand/collapse

Package caddy-man:
Modified: /usr/share/caddy-adapt.8
Modified: /usr/share/caddy-add-package.8
Modified: /usr/share/caddy-build-info.8
Modified: /usr/share/caddy-completion.8
Modified: /usr/share/caddy-environ.8
Modified: /usr/share/caddy-file-server-export-template.8
Modified: /usr/share/caddy-file-server.8
Modified: /usr/share/caddy-fmt.8
Modified: /usr/share/caddy-hash-password.8
Modified: /usr/share/caddy-list-modules.8
Modified: /usr/share/caddy-manpage.8
Modified: /usr/share/caddy-reload.8
Modified: /usr/share/caddy-remove-package.8
Modified: /usr/share/caddy-respond.8
Modified: /usr/share/caddy-reverse-proxy.8
Modified: /usr/share/caddy-run.8
Modified: /usr/share/caddy-start.8
Modified: /usr/share/caddy-stop.8
Modified: /usr/share/caddy-storage-export.8
Modified: /usr/share/caddy-storage-import.8
Modified: /usr/share/caddy-storage.8
Modified: /usr/share/caddy-trust.8
Modified: /usr/share/caddy-untrust.8
Modified: /usr/share/caddy-upgrade.8
Modified: /usr/share/caddy-validate.8
Modified: /usr/share/caddy-version.8
Modified: /usr/share/caddy.8

Package cloudflared: Click to expand/collapse

Package cloudflared:
Modified: /usr/bin/cloudflared