Rename hardware simulation target and reference in README

Makefile

@@ -64,11 +64,6 @@ flash: $(TARGET)
 	       -U lock:w:0xFF:m      \
 	       -U flash:w:$<
 
-.PHONY: run
-run: $(TARGET)
-	$(E) "[SIM] $<"
-	$(Q) $(SIM) -m $(MCU) -f $(FREQ) $<
-
 .PHONY: clean
 clean:
 	$(E) "[REM] $(TARGET)"
@@ -90,6 +85,11 @@ check:
 	$(E) "[CHK] Not implemented."
 	$(Q) true
 
+.PHONY: simulate
+simulate: $(TARGET)
+	$(E) "[SIM] $<"
+	$(Q) $(SIM) -m $(MCU) -f $(FREQ) $<
+
 .PHONY: listen
 listen: opt/tools/serial-listen
 	$(E) "[RUN] $<"