docs: fix Microsoft.UIVerbs hits in dashboard.md (click -> select)

Two genuine instruction-verb hits: the container-row selection toggle
and the schedule-table per-target cancel button both said 'click' where
the action also works via keyboard (Enter/Space) or is otherwise
input-device-neutral.

Left the other 4 hits found in the same #4041 sweep alone (false
positives, not fixed here): agent.md's 'ctrl/middle-click' and
'clicks' (real mouse-button-specific browser/VNC behavior, not reader
instructions), shape.md's 'swipes in' (describes the drawer's own
animation, not a user gesture), and process/gotchas.md's
'click-to-unlock' (weston's actual lock-screen feature name).

docs/web-ui/dashboard.md

@@ -512,7 +512,7 @@ headers tilt -45° via CSS so each column reads as a narrow
 ~28px strip; per-agent cells render as:
 
 - **active target** → `<button>✓</button>` that cancels just
-  that one target on click
+  that one target on selection
 - **cancelled target** → muted `✕` glyph (no button —
   re-adding goes through the edit form's targets multi-select)
 - **not a target** → empty cell
@@ -739,7 +739,7 @@ behind the gateway).
 ## Container row
 
 A full-height **square agent icon** (5em, capped) on the left. The
-icon is the **selection toggle**: click (or Enter/Space) adds/removes
+icon is the **selection toggle**: select (or Enter/Space) adds/removes
 the agent from the selection set; `aria-pressed` reflects the state;
 the tooltip says "select … for bulk actions" or "deselect … (or press
 Esc to clear all)." The `<img>` points at `<url>/icon`; load failure