chore(deps): update docker (k8s-tools/dockerfile)

Author: IK Renovate Bot

k8s-tools/Dockerfile

@@ -5,8 +5,8 @@
 # docker run --rm -it test /bin/bash
 ###
 FROM cloudkats/k8s-test-tools:v1.29.3 as tools
-FROM cloudkats/helm:3.14.3 as helm
-FROM alpine:3.20 as downloader
+FROM cloudkats/helm:3.15.1 as helm
+FROM alpine:3.21 as downloader
 
 # hadolint ignore=DL3018,DL3019
 RUN apk update && apk add --no-cache ca-certificates \
@@ -28,7 +28,7 @@ ARG YQ_BINARY=yq_linux_amd64
 RUN wget --progress=dot:giga https://github.com/mikefarah/yq/releases/download/v${YQ_VERSION}/${YQ_BINARY} -O /usr/bin/yq &&\
   chmod +x /usr/bin/yq
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 LABEL org.opencontainers.image.authors="[email protected]" \
   org.opencontainers.image.vendor="https://github.com/cloudkats" \