fix: Use stable as latest doesn't support armv7

Dockerfile

@@ -11,10 +11,10 @@ RUN \
   chmod a+x \
     /docker-buildx
 
-FROM docker:latest
+FROM docker:stable
 
 LABEL maintainer="Griefed <griefed@griefed.de>"
 
 COPY --from=fetcher /docker-buildx /usr/lib/docker/cli-plugins/docker-buildx
 
-RUN chmod a+x /usr/lib/docker/cli-plugins/docker-buildx
\ No newline at end of file
+RUN chmod a+x /usr/lib/docker/cli-plugins/docker-buildx