Restore the archive links the redesign dropped from Archived Releases

#431 added "- type: Archive" to releases.yml purely so the section got a nav
chip, and put the actual content in a hardcoded container-archived block in
downloads-block.html: a note that older releases are unmaintained but still
downloadable, plus links to the ASF archive and the incubator archive.

The redesign (#844) rewrote downloads-block.html and dropped that block, but
left the now-renamed "Archived Releases" entry in releases.yml behind. Since
that entry has never had a list, the chip and the <h2> have rendered above an
empty grid ever since.

Restores the text as the category description so it is data-driven rather than
hardcoded, and renders any category description under its heading. Every other
category has a null description, so nothing else changes.
diff --git a/assets/scss/_custom_home.scss b/assets/scss/_custom_home.scss
index 3102577..217e617 100644
--- a/assets/scss/_custom_home.scss
+++ b/assets/scss/_custom_home.scss
@@ -1493,6 +1493,11 @@
     font-size: 22px; font-weight: 700; color: $ink; border: 0; padding: 0;
     margin: 32px 0 16px; scroll-margin-top: 80px;
   }
+  .dl-cat-note {
+    max-width: 900px; margin: -6px 0 16px; color: $body; font-size: 14px; line-height: 1.6;
+    p { margin: 0; }
+    a { color: $brand; text-decoration: underline; }
+  }
   .dl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; grid-auto-rows: 1fr; }
   .dl-grid--docker { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 1fr; }
 
diff --git a/data/releases.yml b/data/releases.yml
index dac7562..5b1c56c 100644
--- a/data/releases.yml
+++ b/data/releases.yml
@@ -923,7 +923,14 @@
             - name: sha512
               link: https://downloads.apache.org/skywalking/infra-e2e/1.3.0/skywalking-e2e-1.3.0-bin.tgz.sha512
 - type: Archived Releases
-  description: These components are no longer developed or released. The artifacts below stay available on archive.apache.org for existing users.
+  description: >-
+    Older releases are not maintained and are not recommended for new users, but their source
+    code and binaries are still available if you have a specific reason to need them. Every
+    SkyWalking release is kept in the
+    [Archive repository](https://archive.apache.org/dist/skywalking/), and the
+    [Archive incubating repository](https://archive.apache.org/dist/incubator/skywalking/)
+    holds the releases made while SkyWalking was an incubator project. The components below
+    are no longer developed or released at all.
   list:
     - name: BanyanDB Java Client
       icon: banyan-db
diff --git a/layouts/shortcodes/downloads-block.html b/layouts/shortcodes/downloads-block.html
index 12f4aee..3a98abb 100755
--- a/layouts/shortcodes/downloads-block.html
+++ b/layouts/shortcodes/downloads-block.html
@@ -3,6 +3,7 @@
 {{ range .Site.Data.releases }}
 {{ $cat := or .buttonText (replace .type " " "") }}
 <h2 class="dl-cat" id="{{ $cat }}">{{ .type }}</h2>
+{{ with .description }}<div class="dl-cat-note">{{ . | markdownify }}</div>{{ end }}
 <div class="dl-grid">
   {{ range .list }}
   {{ $id := replace .name " " "" }}