fix(combat): correct spell DC formula

data/pcs/esha.json

@@ -24,6 +24,8 @@
     "ref": 10,
     "will": 5
   },
+  "casting_ability": "int",
+  "resources": {},
   "attacks": [
     {
       "name": "Lance",

data/pcs/harvie.json

@@ -24,6 +24,8 @@
     "ref": 5,
     "will": 2
   },
+  "casting_ability": "wis",
+  "resources": {},
   "attacks": [
     {
       "name": "Talons (attaque naturelle)",

data/pcs/ierlieth.json

@@ -24,6 +24,8 @@
     "ref": 6,
     "will": 3
   },
+  "casting_ability": "wis",
+  "resources": {},
   "attacks": [
     {
       "name": "Bite (attaque naturelle)",

data/pcs/jeanne.json

@@ -24,6 +24,8 @@
     "ref": 6,
     "will": 2
   },
+  "casting_ability": "wis",
+  "resources": {},
   "attacks": [
     {
       "name": "Hooves (attaque naturelle)",

data/pcs/misty.json

@@ -24,6 +24,10 @@
     "ref": 9,
     "will": 3
   },
+  "casting_ability": "cha",
+  "resources": {
+    "bardic_rounds": 12
+  },
   "attacks": [
     {
       "name": "MWK Rapier",

data/pcs/nairda.json

@@ -24,6 +24,10 @@
     "ref": 5,
     "will": 7
   },
+  "casting_ability": "int",
+  "resources": {
+    "hexes": 5
+  },
   "attacks": [
     {
       "name": "Coup à mains nues (aucune arme encodée)",

data/pcs/oni.json

@@ -24,6 +24,10 @@
     "ref": 7,
     "will": 9
   },
+  "casting_ability": "wis",
+  "resources": {
+    "channel_energy": 6
+  },
   "attacks": [
     {
       "name": "Longbow",

data/pcs/tammara.json

@@ -24,6 +24,10 @@
     "ref": 10,
     "will": 8
   },
+  "casting_ability": "wis",
+  "resources": {
+    "grit": 3
+  },
   "attacks": [
     {
       "name": "Rapier (masterwork)",