Update alpine Docker tag to v3.23.3

Author: renovate[bot]

Dockerfile

@@ -11,7 +11,7 @@ COPY sentry ./sentry
 RUN go mod download
 RUN go build -a -ldflags '-extldflags "-static"' -o /bin/linode-cloud-controller-manager-linux /linode
 
-FROM alpine:3.23.2
+FROM alpine:3.23.3
 RUN apk add --update --no-cache ca-certificates
 LABEL maintainers="Linode"
 LABEL description="Linode Cloud Controller Manager"