fix(rules): delay disease is a level-2 conjuration (healing) spell, not level-3 abjuration

data/spells/delay_disease.json

@@ -1,11 +1,11 @@
 {
   "name": "Delay Disease",
-  "level": 3,
-  "school": "abjuration",
+  "level": 2,
+  "school": "conjuration",
   "range": "touch",
   "save": "fort",
   "base_dc": 10,
   "cast_time": "standard",
   "effects": [],
-  "description": "You suppress the progression of one disease the subject carries for 1 hour/level, keeping it dormant. Utility spell, no combat-mechanical effect in the engine. Fortitude negates (harmless)."
+  "description": "SRD spells/delay-disease.md: conjuration (healing), level 2 for nearly every divine/prime class (witch 1 for ratfolk); the engine pins the common level 2. The target becomes temporarily immune to disease for 1 day. Utility spell, no combat-mechanical effect in the engine. Fortitude negates (harmless)."
 }