Initialize to default address

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: sebromero

src/Modulino_LED_Matrix.h

@@ -232,5 +232,5 @@ class ModulinoLEDMatrix
     bool _sequenceDone = false;
     voidFuncPtr _callBack = nullptr;
     HardwareI2C* _wire;
-    uint8_t _address = 0;
+    uint8_t _address = DEFAULT_ADDRESS;
 };