feat: update kubectl to 1.25.16

Author: micdes-pagopa

Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:22.04@sha256:a8fe6fd30333dc60fc5306982a7c51385c2091af1e0ee887166b40a905691fd0
 
-ARG KUBECTL_VERSION=1.22.15
+ARG KUBECTL_VERSION=1.25.16
 
 RUN apt-get update && apt-get install -y curl zip unzip jq ca-certificates curl wget apt-transport-https lsb-release gnupg git gettext-base