Fix: Prevent priests in Spirit of Redemption form from using mana

This change modifies the `HasManaValue::Calculate()` function in `src/strategy/values/StatsValues.cpp`.

Previously, priests in Spirit of Redemption form (angel form when dead) could still attempt to use mana-restoring actions like drinking water, which is illogical since they cannot use mana in that form.

This fix adds a check for the Spirit of Redemption aura (spell ID 20711) to prevent mana usage:
- If the target has the Spirit of Redemption aura, the function returns false
- This prevents priests in angel form from attempting to drink water or use other mana-restoring actions
- Improves bot behavior realism by respecting the limitations of the Spirit of Redemption form

This change works in conjunction with the previous fix that prevents non-mana-using classes from attempting to restore mana, creating a more comprehensive solution for mana management.

src/strategy/values/StatsValues.cpp

@@ -119,6 +119,9 @@ bool HasManaValue::Calculate()
     Unit* target = GetTarget();
     if (!target)
         return false;
+    
+    if (target->HasAura(20711)) // Spirit of Redemption
+        return false;
 
     return target->GetPower(POWER_MANA);
 }