Properly quote entrypoint args; update helm versions

For rancher/rke2#948

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>

Author: brandond

entry

@@ -124,5 +124,5 @@ helm_content_decode
 if [ "$1" != "delete" ]; then
   helm_repo_init
 fi
-helm_update $@
+helm_update "$@"
 

package/Dockerfile

@@ -1,9 +1,9 @@
 FROM alpine:3.12 as extract
 RUN apk add -U curl ca-certificates
 ARG ARCH
-RUN curl https://get.helm.sh/helm-v2.16.10-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
+RUN curl https://get.helm.sh/helm-v2.17.0-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
 RUN mv /usr/bin/helm /usr/bin/helm_v2
-RUN curl https://get.helm.sh/helm-v3.3.1-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
+RUN curl https://get.helm.sh/helm-v3.5.4-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
 RUN mv /usr/bin/helm /usr/bin/helm_v3
 
 FROM alpine:3.12