Fix docker_lite_push make target (vitessio#16662)

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

Makefile

@@ -328,6 +328,7 @@ $(DOCKER_LITE_TARGETS): docker_lite_%:
 	${call build_docker_image,docker/lite/Dockerfile.$*,vitess/lite:$*}
 
 docker_lite_push:
+	echo "pushing lite image: latest" && docker push vitess/lite:latest
 	for i in $(DOCKER_LITE_SUFFIX); do echo "pushing lite image: $$i"; docker push vitess/lite:$$i || exit 1; done
 
 docker_lite_all: docker_lite $(DOCKER_LITE_TARGETS)