refactor(config): migrate sidebars to stacked layouts

config/technology/right.yml

@@ -1,9 +1,9 @@
-# Technology right rail — self-hosting board + futurism deep dives
+# Technology right rail — self-hosting board and deep dives (stacked)
 - size: small
   widgets:
     - type: reddit
       subreddit: selfhosted
-      limit: 7
+      limit: 8
       style: vertical-cards
     - type: videos
       style: vertical-list
@@ -14,3 +14,12 @@
         - UCZFipeZtQM5CKUjx6grh54g # Isaac Arthur
         - UCR9sFzaG9Ia_kXJhfxtFMB # melodysheep
         - UCSeuZvDGosq1zC6NqgqGo-Q # merlin
+    - type: videos
+      style: vertical-list
+      collapse-after: 4
+      title: Education
+      channels:
+        - UCHnyfMqiRRG1u-2MsSQLbXA # Veritasium
+        - UCsXVk37bltHxD1rDPwtNM8QL # Kurzgesagt
+        - UCxqAWLTk1CmBvZFPzeZMd9A # Domain of Science
+        - UCeUJFQ0D9qs6aVNyUt9fkeQ # The Armchair Historian