pg/sky130: Fix tt_pg_3v3_2 DRC errors diff/tap 18,20,24

Theses rules were not checked before and so we always had a violation.
It's not an MR so we never heard anything about them, but still
good to fix it.

Signed-off-by: Sylvain Munaut <[email protected]>

Author: smunaut

pg/sky130/tt_pg_3v3_2/gds/tt_pg_3v3_2.gds

@@ -50,16 +50,21 @@ MACRO tt_pg_3v3_2
   END ctrl
   OBS
       LAYER nwell ;
-        RECT 0.000 223.420 13.800 225.510 ;
+        RECT 0.000 225.260 13.800 225.510 ;
+        RECT 0.000 223.420 12.530 225.260 ;
       LAYER pwell ;
         RECT 0.000 220.600 8.360 223.420 ;
       LAYER nwell ;
-        RECT 8.360 220.600 13.800 223.420 ;
+        RECT 8.360 221.230 12.530 223.420 ;
+      LAYER pwell ;
+        RECT 12.530 221.230 13.890 225.260 ;
+      LAYER nwell ;
+        RECT 8.360 220.600 13.800 221.230 ;
         RECT 0.000 0.500 13.800 220.600 ;
       LAYER li1 ;
-        RECT 0.130 0.830 13.650 225.400 ;
+        RECT 0.130 0.830 13.740 225.400 ;
       LAYER met1 ;
-        RECT 0.100 0.800 13.710 225.740 ;
+        RECT 0.100 0.800 13.800 225.740 ;
       LAYER met2 ;
         RECT 0.100 0.800 13.345 225.540 ;
       LAYER met3 ;