Update README.md

Author: WallaceWilliam

README.md

@@ -11,6 +11,6 @@ Package include
 builder scrypt test only
 - board d1_mini 4M
 - CONFIG_PARTITION_TABLE_SINGLE_APP
-- flash over USB CH2102 (and similar)
+- flash over USB CP2102 (and similar)
 
-features such as secureboot, OTA, flash less than 4M - NOT TESTED!!
+features such as secureboot, OTA, flash less than 4M - NOT TESTED!!