bump zombienet version (#1786)

Author: pepoviola

.gitlab-ci.yml

@@ -30,7 +30,7 @@ variables:
   CI_IMAGE:                        "paritytech/ci-linux:production"
   DOCKER_OS:                       "debian:stretch"
   ARCH:                            "x86_64"
-  ZOMBIENET_IMAGE:                 "docker.io/paritytech/zombienet:v1.2.80"
+  ZOMBIENET_IMAGE:                 "docker.io/paritytech/zombienet:v1.2.82"
 
 .collect-artifacts:
   artifacts: