fix ADC channel 4 pin on CH32V003

Fix ch32-rs/ch32-hal#68

Author: romainreignier

data/family/CH32V0.yaml

@@ -570,7 +570,7 @@
       signal: IN2
     - pin: PD2
       signal: IN3
-    - pin: PC3
+    - pin: PD3
       signal: IN4
     - pin: PD5
       signal: IN5