fix release binary path

docker/Dockerfile.arm

@@ -1,4 +1,4 @@
-FROM amd64/docker:20.10-dind
+FROM amd632v7docker:20.10-dind
 
 LABEL maintainer="Robert Kaussow <mail@thegeeklab.de>"
 LABEL org.opencontainers.image.authors="Robert Kaussow <mail@thegeeklab.de>"
@@ -21,6 +21,6 @@ RUN apk --update add --virtual .build-deps curl && \
     rm -rf /var/cache/apk/* && \
     rm -rf /tmp/*
 
-ADD release/linux/amd64/drone-docker-buildx /bin/
+ADD release/arm/drone-docker-buildx /bin/
 
 ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh", "drone-docker-buildx"]