🎨 Small tweak, ms => now

Marlin/src/feature/power.cpp

 
 void Power::check() {
   static millis_t nextPowerCheck = 0;
-  millis_t ms = millis();
-  if (ELAPSED(ms, nextPowerCheck)) {
-    nextPowerCheck = ms + 2500UL;
+  millis_t now = millis();
+  if (ELAPSED(now, nextPowerCheck)) {
+    nextPowerCheck = now + 2500UL;
     if (is_power_needed())
       power_on();
-    else if (!lastPowerOn || (POWER_TIMEOUT > 0 && ELAPSED(ms, lastPowerOn + SEC_TO_MS(POWER_TIMEOUT))))
+    else if (!lastPowerOn || (POWER_TIMEOUT > 0 && ELAPSED(now, lastPowerOn + SEC_TO_MS(POWER_TIMEOUT))))
       power_off();
   }
 }