Bump to latest hugo version 0.115.4

[deining]

This PR bumps hugo to latest released version v.115.4.

It also resolves various deprecation warnings emitted by latest hugo version.

hugo server
WARN  config: languages.zh.description: custom params on the language top level is deprecated and will be removed in a future release. Put the value below [languages.zh.params]. See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120
WARN  config: languages.en.description: custom params on the language top level is deprecated and will be removed in a future release. Put the value below [languages.en.params]. See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120
WARN  config: languages.fr.description: custom params on the language top level is deprecated and will be removed in a future release. Put the value below [languages.fr.params]. See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120
WARN  config: languages.ja.description: custom params on the language top level is deprecated and will be removed in a future release. Put the value below [languages.ja.params]. See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120
Start building sites … 
hugo v0.115.0-67caf50698783d3b3d78559ac81483d83e5e1a35+extended linux/amd64 BuildDate=2023-06-29T15:56:39Z VendorInfo=gohugoio

WARN  found no layout file for "html" for kind "section": You should create a template file which matches Hugo Layouts Lookup Rules for this combination.

[flynnduism]

Testing this locally, everything works and builds with the hugo bump.

To merge this, you will need to sign your commits for the DCO to pass

[deining]

Testing this locally, everything works and builds with the hugo bump.

Great to hear that. Thanks for your review.

To merge this, you will need to sign your commits for the DCO to pass

My commit is signed now 😄.

[flynnduism]

Thank you! Debugging a Netlify/Hugo build problem, once I get to the bottom of that I will merge