DOP-4543: Generalize bottom cards to use large-icon style (#167)

Author: rayangler

source/index.txt

@@ -174,22 +174,20 @@ More Ways to Learn
 
 .. card-group::
    :columns: 3
+   :style: large-icon
    :layout: default
 
    .. card::
       :icon: /images/general-content-learn.svg
       :headline: Take Free Courses on MongoDB University
-      :tag: landing-bottom
       :url: https://learn.mongodb.com/
 
    .. card::
       :icon: /images/general-content-community.svg
       :headline: Join Forums and Discussions
-      :tag: landing-bottom
       :url: https://www.mongodb.com/community/
 
    .. card::
       :icon: /images/technical-mdb-devhub.svg
       :headline: View Developer Resources
-      :tag: landing-bottom
       :url: https://www.mongodb.com/developer/