Increase PSRAM malloc threshold from 256 bytes to 2048 bytes (#9758)

src/main.cpp

@@ -389,8 +389,8 @@ void setup()
 
 #if defined(ARCH_ESP32) && defined(BOARD_HAS_PSRAM)
 #ifndef SENSECAP_INDICATOR
-    // use PSRAM for malloc calls > 256 bytes
-    heap_caps_malloc_extmem_enable(256);
+    // use PSRAM for malloc calls > 2048 bytes
+    heap_caps_malloc_extmem_enable(2048);
 #endif
 #endif