fix AI slop

Author: masci

layouts/shortcodes/build-date.html

@@ -1,3 +1,3 @@
-{{- /* Build-time date. `hugo.BuildDate` can be overridden (e.g. in CI) and may be empty in some contexts, so we fallback to `now`. */ -}}
-{{- (or hugo.BuildDate now) | time.Format "January 2, 2006" -}}
+{{- /* Render/build time (always). */ -}}
+{{- now | time.Format "January 2, 2006" -}}