Clarify what the "r4isdhc.com.cn cards" are

Author: RocketRobz

7zfile/Flashcard users/Autoboot/README.txt

@@ -4,7 +4,7 @@ Ace3DS+ folder:
 - Ace3DS+
 - Ace3DS X
 - R4 i.L.S
-- r4isdhc.com.cn cards
+- R4 SDHC Dual-Core Smart Update (r4isdhc.com.cn)
 - r4isdhc.hk 2020+ (Year in star shape)
 - r4isdhc.hk 2021
 - R4infinity 2

7zfile/Flashcard users/Flashcart Loader/README.txt

@@ -21,7 +21,7 @@ Ace3DS+ folder:
 R4iLS folder:
 - Gateway Blue
 - R4 i.L.S
-- r4isdhc.com.cn carts
+- R4 SDHC Dual-Core Smart Update (r4isdhc.com.cn)
 - r4isdhc.hk carts 2020 or later
 - R4infinity.com carts
 - white R4i-XDS 2014 carts