Envoy Gateway Blog articles should have a visible publish date

*Description*:
Currently, there is no indication on when an article is written in the envoy gateway blog.
Some pages, like Release Notes have the date added into the article which helps understand when the release happened:
For eg: https://gateway.envoyproxy.io/news/releases/notes/v1.4.3/

But rest of the blog does not have this, even the articles talking about the release have no indication on when they were published.

For Eg: https://gateway.envoyproxy.io/news/releases/v1.5/
I can see the bottom of the page where it gives when the blog was **Last Modified** but that seems to be the just the recent hugo build time which is the same throughout the blog.

Knowing when an article was published helps me ascertain the activeness of the project at a first glance and I do not need to question the validity of the data contained in the blog post (if the article is too old, then it is probably not too relevant/more things might have changed since the article).

I can see that Hugo has a publish data field at: https://gohugo.io/methods/page/publishdate/ but I am not sure if that is enough for it to be visble on the blog - I think some changes to some template will be required to get this working.