cores: arduino: zephyrPrint: Fix typo

Fix minor typo in comments.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

cores/arduino/zephyrPrint.cpp

@@ -84,7 +84,7 @@ size_t print_number_base_pow2(void *ctx, unsigned long long ull, unsigned bits)
 
 /*
  * This is the default implementation.
- * It will be overridden by subclassese.
+ * It will be overridden by subclasses.
  */
 size_t arduino::Print::write(const uint8_t *buffer, size_t size) {
 	size_t i;