docs: v4.0.0 confirmed in game; drop wrong crew claim

Radiators carry no crew; CommandConsumer is command points. Status
section records the in-game confirmation of all four behaviours.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011oLWY1G6S8U35bi2FxVWni

mod.rules

@@ -34,7 +34,7 @@ Description = "Radiators switched OFF bank heat and vent only when the ship's he
               "- ON: vanilla. Vents constantly, the heat is gone.\n\n"\
               "- OFF: banks heat as a deep missile reserve. The radiator idles while the heat "\
               "network has room and vents as it approaches full, so the ship never overflows "\
-              "heat onto its own parts. An OFF radiator also frees its crew.\n\n"\
+              "heat onto its own parts.\n\n"\
               "- Fail-safe: idling requires measured headroom on the network. If that runs low, "\
               "or cannot be measured at all, radiators vent."