Update package explicitly

As ruby:3.2-slim-bookworm parent base image is not
synced to recent point release yet, so Explicitly update it.

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

Author: kenhys

Dockerfile.template.erb

@@ -101,6 +101,7 @@ RUN apt-get update \
       make gcc g++ libc-dev \
       wget bzip2 gnupg dirmngr \
     " \
+ && apt-get -V -y upgrade \
  && apt-get install -y --no-install-recommends $buildDeps \
 <% end %>
  && echo 'gem: --no-document' >> /etc/gemrc \