docs: drop redundant 'the goal tree' section header

The whole doc is the goal tree; the H2 restated the title.

Generated-by: opencode (GLM)

capsite-checklist.md

@@ -1,12 +1,11 @@
 # capsite goal tree
 
-Nested checkboxes form a goal tree: each `- [ ]` is a goal; its indented
-children are the subgoals/steps that must pass before it (an item is only
-checked when **all** its children are checked — or, for leaf items, when
-it has passed verification itself). Working notes live under each goal;
-[the capsite notes](capsite-notes.md) carry the background narrative.
-
-## the goal tree
+Nested checkboxes form the goal tree itself: each `- [ ]` is a goal; its
+indented children are the subgoals/steps that must pass before it (an item
+is only checked when **all** its children are checked — or, for leaf
+items, when it has passed verification itself). Working notes live under
+each goal; [the capsite notes](capsite-notes.md) carry the background
+narrative.
 
 - [ ] **EmDash site (madmode) collects diigo.com bookmarks; credentials
       held by the host, never inside the plugin** (background: