Updated demo content to fix error with taxonomy in a fresh installation

_demo/config/themes/future.yaml

@@ -1,41 +0,0 @@
-enabled: true
-production-mode: true
-favicon:
-  user/themes/future2021/images/Grav_logo.png:
-    name: Grav_logo.png
-    type: image/png
-    size: 15355
-    path: user/themes/future2021/images/Grav_logo.png
-blog_page: /blog
-slogan: 'AYUDA DE GRAV EN ESPAÑOL'
-latestposts: true
-custom_logo:
-  user/themes/future2021/images/logo/Grav_logo.png:
-    name: Grav_logo.png
-    type: image/png
-    size: 15355
-    path: user/themes/future2021/images/logo/Grav_logo.png
-custom_logo_mobile: {  }
-footer:
-  title: ABOUT
-  description: 'Mauris neque quam, fermentum ut nisl vitae, convallis maximus nisl. Sed mattis nunc id lorem euismod amet placerat. Vivamus porttitor magna enim, ac accumsan tortor cursus at phasellus sed ultricies.'
-  copyright_text: 'DESIGN: <a href="https://html5up.net/" target="_blank">HTML5 UP</a>. IMAGES: <a href="http://wallpaperswide.com/" target="_blank">WALLPAPESWIDE</a>.'
-  button_url: about
-  button_text: 'Show more'
-social:
-  -
-    name: Twitter
-    url: 'https://www.twitter.com'
-    icon: 'fa fa-twitter'
-  -
-    name: Facebook
-    url: 'https://www.facebook.com'
-    icon: 'fa fa-facebook'
-  -
-    name: Instagram
-    url: 'https://www.instagram.com'
-    icon: 'fa fa-instagram'
-dropdown:
-  enabled: true
-miniposts: true
-miniposts_number: 3

_demo/config/themes/future2021.yaml

@@ -47,4 +47,4 @@ custommenu:
     text: Grav
     icon: arrow-circle-right
     url: 'https://getgrav.org'
-    target: _blank
+    target: _blank