Fix issues with rendering breacrumbs and blog nav outside main site

src/_includes/global/content.njk

@@ -1,5 +1,6 @@
 <header class="main__header">
     {% if isArticle %}
+        {% if eleventyNavigation %}
             <ul class="breadcrumbs">
                 {% set breadcrumbNavPages = collections.all | eleventyNavigationBreadcrumb(articleTitle) %}
                 {%- for entry in breadcrumbNavPages %}
@@ -9,6 +10,7 @@
                 ➔
                 {%- endfor %}
             </ul>
+        {% endif %}
 
         <h1>{{ articleTitle }}</h1>
         <div class="article__info">
@@ -48,7 +50,12 @@
 		</div>
     {% endif %}
 
-    {% if tags and tags.includes("contents") or page.url === "/articles/" or tags and tags.includes("blog pages") %}
+    {% if
+        tags and tags.includes("articles")
+        or tags and tags.includes("posts")
+        or page.url === "/articles/"
+        or tags and tags.includes("blog pages")
+    %}
         {% include "main/content-nav.njk" %}
     {% endif %}