fix: feed dates

src/_includes/base.liquid

@@ -61,7 +61,7 @@
             "@type": "Person",
             "name": "{{ meta.author }}"
           },
-          "datePublished": "{{ page.date | isoDateOnly }}"
+          "datePublished": "{{ page.date | isoDateOnly: '.' }}"
         }
       </script>
       {% else %}

src/pages/sitemap.liquid

@@ -8,7 +8,7 @@ eleventyExcludeFromCollections: true
     {% if not page.data.draft %}
       <url>
         <loc>{{ meta.url }}{{ page.url }}</loc>
-        <lastmod>{{ page.date | isoDateOnly }}</lastmod>
+        <lastmod>{{ page.date | isoDateOnly: '-' }}</lastmod>
         <changefreq>{%- if page.data.changeFreq -%}{{ page.data.changeFreq }}{%- else -%}monthly{%- endif -%}</changefreq>
         <priority>{%- if page.data.priority -%}{{ page.data.priority }}{%- else -%}0.5{%- endif %}</priority>
       </url>

src/posts/2023/webmentions-in-eleventy.md

@@ -121,7 +121,7 @@ When the build runs, it renders any mentions of a given post via a [liquid.js](h
                 />
                 <div class="ml-3">
                     <p class="text-sm group-hover:text-blue-500 dark:group-hover:text-blue-300">{{mention.content.text}}</p>
-                    <p class="mt-1 text-xs group-hover:text-blue-500 dark:group-hover:text-blue-300">{{mention.published | isoDateOnly}}</p>
+                    <p class="mt-1 text-xs group-hover:text-blue-500 dark:group-hover:text-blue-300">{{mention.published | isoDateOnly: '.' }}</p>
                 </div>
             </a>
         </div>