Say that reserve asks the knowledge base for the highest number, not hq (hq issue 493)

Since #214 reserve reads knowledge_highest; its description still named hq's folders.

modules/mesh-issues/cmd/mesh-issues/main.go

@@ -646,13 +646,14 @@ func Tools(t *Tracker) []stdio.Tool {
 			}},
 		{Name: Seat + ".reserve",
 			Description: "Reserve the next decision or research number, before the record is written, and get it: never " +
-				"one another caller got, and always above every number hq already holds. The answer is the kind and the " +
+				"one another caller got, and always above the highest number the knowledge base holds (knowledge_highest; " +
+				"hq issue 493). The answer is the kind and the " +
 				"number, and the number as a record's name starts with it (0292 for a decision, 046 for research). " +
 				"Optionally for: what the record is about, in one line. A reserved number is spent forever, whether or " +
 				"not its record lands, and is never handed out again; who reserved it, when and for what are kept. " +
 				"Refused, taking no number: a kind that is not decision or research (an issue's number comes from " +
 				"open), a for that is not one line of plain text or carries a secret, an unknown argument, and the " +
-				"first number of a kind while what hq holds cannot be read.",
+				"first number of a kind while the knowledge base does not answer its highest number.",
 			Input: schema([]string{"kind"}, map[string]any{
 				"kind": map[string]any{"type": "string", "enum": ReserveKinds, "description": "which number: decision or research"},
 				"for":  text("what the record is about, in one line, such as: the knowledge base holds decisions"),