Dark icons - v1.20 (#561)

Author: mmeigs

source/images/icons/card1.svg

@@ -103,23 +103,23 @@ Learn the {+atlas-cli+} commands and optimize your workflow with advanced tutori
    .. card::
       :cta: See All Commands
       :url: https://www.mongodb.com/docs/atlas/cli/stable/command/atlas/
-      :icon: /images/icons/card1.svg
+      :icon: atlas_cli
       :icon-alt: AtlasCLI Commands Icon
 
       Discover new {+atlas-cli+} commands
 
    .. card::
       :cta: View All Tutorials
       :url: https://www.mongodb.com/docs/atlas/cli/stable/atlas-cli-tutorials/
-      :icon: /images/icons/card2.svg
+      :icon: general_content_tutorial
       :icon-alt: Tutorials Icon
 
       Explore {+atlas-cli+} workflows with guided tutorials
 
    .. card::
       :cta: Read Release Notes
       :url: https://www.mongodb.com/docs/atlas/cli/stable/atlas-cli-changelog/
-      :icon: /images/icons/card3.svg
+      :icon: atlas_product_family
       :icon-alt: Atlas Icon
 
       Learn what's new in the {+atlas-cli+}