Update xdrv_05_irremote.ino

Reduce IR_TIME_AVOID_DUPLICATE to 50ms which was fixed in xdrv_05_irremote_full.ino in PR arendst#9969 but not here.
Converted IR_TIME_AVOID_DUPLICATE from const to #define to enable override in the config override file.

tasmota/xdrv_05_irremote.ino

@@ -176,7 +176,10 @@ void IrSendInit(void)
 \*********************************************************************************************/
 
 const bool IR_RCV_SAVE_BUFFER = false;         // false = do not use buffer, true = use buffer for decoding
-const uint32_t IR_TIME_AVOID_DUPLICATE = 500;  // Milliseconds
+
+#ifndef IR_TIME_AVOID_DUPLICATE
+#define IR_TIME_AVOID_DUPLICATE = 50           // Milliseconds
+#endif  // IR_TIME_AVOID_DUPLICATE
 
 #include <IRrecv.h>