Upgrade to the newest Hugo version

There have been a couple of changes recently that _might_ require
updates to how we build the site.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

hugo.yml

@@ -35,7 +35,7 @@ module:
   - source: external/docs/content
     target: content
 params:
-  hugo_version: 0.148.2
+  hugo_version: 0.152.2
   pagefind_version: 1.4.0
   latest_version: 2.53.0
   latest_relnote_url: https://gitlab.com/git-scm/git/-/blob/HEAD/Documentation/RelNotes/2.53.0.adoc