Fix bash completion for `docker service update`

Signed-off-by: Harald Albers <github@albersweb.de>
(cherry picked from commit 01ac33ce165835a3ccde7d151d7d2905c8391461)
Signed-off-by: Victor Vieux <vieux@docker.com>

contrib/completion/bash/docker

@@ -2734,7 +2734,6 @@ _docker_service_update() {
 		--mount
 		--network
 		--no-healthcheck
-		--publish -p
 		--replicas
 		--reserve-cpu
 		--reserve-memory
@@ -2772,7 +2771,7 @@ _docker_service_update() {
 			--host
 			--mode
 			--name
-			--publish
+			--publish -p
 			--secret
 		"