Issue #3416209 by Grimreaper: Nav preview is broken

Closes #3416209

templates/patterns/nav/nav.ui_patterns.yml

@@ -42,9 +42,11 @@ nav:
           id: "nav_item"
           active: true
           link:
-            type: 'link'
-            title: 'Active'
-            url: 'https://example.com'
+            type: 'html_tag'
+            tag: 'a'
+            value: 'Active'
+            attributes:
+              href: 'https://example.com'
         - type: "pattern"
           id: "dropdown"
           button_type: "a"
@@ -77,13 +79,17 @@ nav:
         - type: "pattern"
           id: "nav_item"
           link:
-            type: 'link'
-            title: 'Much longer nav link'
-            url: 'https://example.com'
+            type: 'html_tag'
+            tag: 'a'
+            value: 'Much longer nav link'
+            attributes:
+              href: 'https://example.com'
         - type: "pattern"
           id: "nav_item"
           disabled: true
           link:
-            type: 'link'
-            title: 'Disabled'
-            url: 'https://example.com'
+            type: 'html_tag'
+            tag: 'a'
+            value: 'Disabled'
+            attributes:
+              href: 'https://example.com'