Fix JSON-LD image URL for page bundles in social shares

The structured data image URL used absURL which resolved post-cover.png
to the site root instead of the post directory. Some platforms like
LinkedIn use JSON-LD for previews, causing the site cover to display
instead of the post cover.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: johanrin

layouts/partials/meta/post.html

@@ -53,7 +53,7 @@
         "dateModified": "{{ dateFormat "2006-01-02" .Lastmod }}",
         "image": {
         "@type": "ImageObject",
-        "url": "{{ with .Params.images }}{{ index . 0 | absURL }}{{ end }}",
+        "url": "{{ with .Params.images }}{{ $img := index . 0 }}{{ if eq $.Kind "page" }}{{ printf "%s%s" $.Permalink $img }}{{ else }}{{ $img | absURL }}{{ end }}{{ end }}",
         "width": 1200,
         "height": 630
         },