Update `flux-cli` image to Alpine 3.22 and kubectl 1.34

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Dockerfile

@@ -1,16 +1,16 @@
-FROM alpine:3.21 AS builder
+FROM alpine:3.22 AS builder
 
 RUN apk add --no-cache ca-certificates curl
 
 ARG ARCH=linux/amd64
-ARG KUBECTL_VER=1.33.0
+ARG KUBECTL_VER=1.34.0
 
 RUN curl -sL https://dl.k8s.io/release/v${KUBECTL_VER}/bin/${ARCH}/kubectl \
     -o /usr/local/bin/kubectl && chmod +x /usr/local/bin/kubectl
 
 RUN kubectl version --client=true
 
-FROM alpine:3.21 AS flux-cli
+FROM alpine:3.22 AS flux-cli
 
 RUN apk add --no-cache ca-certificates