Update hugo to 0.155.1

[thomasrebele]

As discussed in #78 (comment), updating Hugo fixes some formatting issues. Here a PR that updates Hugo to the latest version.

There are some warnings in the build, WARN Raw HTML omitted, so I looked for the cause. I think it's because of a code listing that contains generics, 2: required list<ColumnStatisticsObj> statsObj;. The <...> are interpreted as an invalid HTML tag. In the current rendering (with version 0.91.2) the <ColumnStatisticsObj> is missing. So the previous version has the same problem, it just does not show the warnings.

I've downloaded the artifact (from the build in Upload site artifact), launched a webserver (busybox httpd -v -f -p 127.0.0.1:8080), and checked a few pages. They look the same with a few improvements:

• superfluous lines at the end of code listings are removed
• the superfluous apostrophes mentioned in Fix formatting issues in the HowToContribute guide #78 (comment) are removed as well

[maheshrajus]

LGTM

[zabetak]

Upgraded my local environment to hugo 0.155.1 and built the website. Spot check a few pages and things look good.

[zabetak]

Thanks for the PR @thomasrebele and @maheshrajus for the review!