fix: double touch interval was reduced to 100ms to feel more natural

src/tft-touch.cpp

@@ -14,7 +14,7 @@
 #define PWM_FREQ_BCKL 400
 #define PWM_BITS_BCKL 8
 #define PWM_MAX_BCKL ((1 << PWM_BITS_BCKL) - 1)
-#define DOUBLE_TOUCH_INTERVAL 500
+#define DOUBLE_TOUCH_INTERVAL 100
 
 TFT_eSPI tft = TFT_eSPI();
 XPT2046_Bitbang touchscreen(TOUCH_MOSI, TOUCH_MISO, TOUCH_CLK, TOUCH_CS);