Add caching card to page.

Author: mandiwise

src/pages/learn/best-practices.mdx

@@ -37,6 +37,11 @@ The articles in this section should not be taken as gospel, and in some cases ma
       title: "Global Object Identification",
       link: "/learn/global-object-identification/",
       description: "Consistent object access enables simple caching and object lookups",
+        },
+    {
+      title: "Caching",
+      link: "/learn/caching/",
+      description: "Provide Object Identifiers so clients can build rich caches",
     },
     {
       title: "Performance",