Mark stale release page links as stale

For deprecated site versions, make it clear that the links are to stale
pages.

data/i18n/en/en.toml

@@ -450,6 +450,9 @@ other = "Options"
 [outdated_blog__message]
 other = "This article is more than one year old. Older articles may contain outdated content. Check that the information in the page has not become incorrect since its publication."
 
+[page_deprecated]
+other = "(stale page)"
+
 [patch_release]
 other = "Patch Release"
 

layouts/docs/release-info.html

@@ -6,7 +6,7 @@
   {{ range where .Site.Pages "Section" "releases" }}
     {{ if not .IsNode }}
       <div class="entry">
-        <h5><a href="{{ .RelPermalink }}">{{ .Title }}</a></h5>
+        <h5><a href="{{ .RelPermalink }}">{{ .Title }}</a> {{ T "page_deprecated" }}</h5>
       </div>
     {{ end }}
   {{ end }}