Core&DB/Spells: Fix DK T8 4p bonus

- Added missing spell to DB
- Corrected DBC data that is, very likely, wrong
Closes #6062

src/server/game/Spells/SpellMgr.cpp

@@ -3238,6 +3238,9 @@ void SpellMgr::LoadDbcDataCorrections()
                 spellInfo->EffectDieSides[0] = 0; // was 1, that should probably mean seat 0, but instead it's treated as spell 1
                 spellInfo->EffectBasePoints[0] = 52391; // Ride Vehicle (forces seat 0)
                 break;
+            case 64745:
+                spellInfo->EffectBasePoints[0] = 100; // 100% chance of procc'ing, not -10% (chance calculated in PrepareTriggersExecutedOnHit)
+                break;
             case 19970: // Entangling Roots (Rank 6) -- Nature's Grasp Proc
             case 19971: // Entangling Roots (Rank 5) -- Nature's Grasp Proc
             case 19972: // Entangling Roots (Rank 4) -- Nature's Grasp Proc