[Docs] fix: replace deprecated Hugo site accessors

assets/json/offline-search-index.json

@@ -0,0 +1,18 @@
+{{- $.Scratch.Add "offline-search-index" slice -}}
+{{- range where site.AllPages ".Params.exclude_search" "!=" true -}}
+{{- /* We have to apply `htmlUnescape` again after `truncate` because `truncate` applies `html.EscapeString` if the argument is not HTML. */ -}}
+{{- /* Individual taxonomies can be added in the next line by add '"taxonomy-name" (.Params.taxonomy-name | default "")' to the dict (as seen for categories and tags). */ -}}
+{{- $.Scratch.Add
+    "offline-search-index"
+    (dict
+        "ref" .RelPermalink
+        "title" .Title
+        "categories" (.Params.categories | default "")
+        "tags" (.Params.tags | default "")
+        "description" (.Description | default "")
+        "body" (.Plain | htmlUnescape)
+        "excerpt" ((.Description | default .Plain) | htmlUnescape | truncate (.Site.Params.offlineSearchSummaryLength | default 70) | htmlUnescape)
+    )
+-}}
+{{- end -}}
+{{- $.Scratch.Get "offline-search-index" | jsonify -}}

layouts/_default/sitemap.xml

@@ -1,7 +1,7 @@
 {{ printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
   xmlns:xhtml="http://www.w3.org/1999/xhtml">
-  {{ range .Site.AllPages }}
+  {{ range site.AllPages }}
   {{- if and (not .Params.sitemap_exclude) (not .Draft) }}
   <url>
     <loc>{{ .Permalink }}</loc>

layouts/partials/feature-info.html

@@ -1,5 +1,5 @@
 {{ $currentPage := .Page.Permalink }}
-{{ $features := .Site.Data.feature_data }}
+{{ $features :=hugo.Data.feature_data }}
 {{ if not $features }}
 {{ with readFile "data/feature_data.json" }}
 {{ $features = . | transform.Unmarshal }}

layouts/partials/recent-discussions.html

@@ -1,7 +1,7 @@
 {{ if eq .Section "kanvas" }}
 <h2>Recent Discussions on Kanvas</h2>
 <ul>
-    {{ with site.Data.kanvas_discuss }}
+    {{ with hugo.Data.kanvas_discuss }}
       {{ $users := .users }}
       {{ $topics := sort .topic_list.topics "last_posted_at" "desc" }}