ch32v203 fix QFN symbol and footprint

mcu/wch_ch32v203.yaml

@@ -102,8 +102,7 @@ pinout@G6U: # QFN28
     PA6: 12
     PA7: 13
     PA9: 18
-    PA10: 19
-    PA11: 19
+    PA10/PA11: 19
     PA12: 20
     PA13: 21
     PA14: 22
@@ -123,7 +122,7 @@ pinout@G6U: # QFN28
     OSC_OUT: 3
     NRST: 4
   GROUND:
-    VSS: 16, 21 # pad
+    VSS: 16, 29 # pad
   POWER:
     VDD: 17
     VDDA: 5
@@ -437,6 +436,8 @@ housing@F8U: # QFN20
   leadLength: 0.4
   pitch: 0.4
   leadCount: 20
+  rowCount: 5
+  columnCount: 5
   tabWidth: 1.7
   tabLength: 1.7
   tabPosition: 0.0, 0.0
@@ -451,8 +452,10 @@ housing@G6U: # QFN28
   leadLength: 0.4
   pitch: 0.4
   leadCount: 28
-  tabWidth: 2.8
-  tabLength: 2.8
+  rowCount: 7
+  columnCount: 7
+  tabWidth: 2.7
+  tabLength: 2.7
   tabPosition: 0.0, 0.0
 
 housing@CxU: # QFN48