chore(docs): fix type about file system cache_size setting
@@ -21,7 +21,7 @@ static lv_fs_drv_t drv; /*Needs to be static or global*/
lv_fs_drv_init(&drv); /*Basic initialization*/
drv.letter = 'S'; /*An uppercase letter to identify the drive */
-drv.cache_size = my_cahce_size; /*Cache size for reading in bytes. 0 to not cache.*/
+drv.cache_size = my_cache_size; /*Cache size for reading in bytes. 0 to not cache.*/
drv.ready_cb = my_ready_cb; /*Callback to tell if the drive is ready to use */
drv.open_cb = my_open_cb; /*Callback to open a file */
