Bump alpine from 3.17 to 3.18 in /package

Bumps alpine from 3.17 to 3.18.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.17 as extract
+FROM alpine:3.18 as extract
 RUN apk add -U curl ca-certificates
 ARG ARCH
 RUN curl https://get.helm.sh/helm-v2.17.0-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
@@ -23,7 +23,7 @@ RUN mkdir -p /go/src/github.com/helm/helm-mapkubeapis && \
            /go/src/github.com/helm/helm-mapkubeapis/config \
            /root/.local/share/helm/plugins/helm-mapkubeapis/
 
-FROM alpine:3.17
+FROM alpine:3.18
 ARG BUILDDATE
 LABEL buildDate=$BUILDDATE
 RUN apk --no-cache upgrade && \