Fix duplicate 'now' variable declaration in loop() function

Co-authored-by: dorkmo <[email protected]>

Author: Copilot

TankAlarm-112025-Server-BluesOpta/TankAlarm-112025-Server-BluesOpta.ino

@@ -2651,7 +2651,7 @@ void loop() {
 
   handleWebRequests();
 
-  unsigned long now = millis();
+  now = millis();
   if (now - gLastPollMillis > 5000UL) {
     gLastPollMillis = now;
     pollNotecard();