Increase RA Grenadier damage vs. Heavy armor

5% versus Heavy armor is way too low. Increasing it to 25% results in an effective increase from 3 to 15 damage points for full hits, making grenadiers quite a bit more versatile, while still leaving a big enough gap to Rocket Soldiers in effectiveness versus tanks and defenses.

mods/ra/weapons/other.yaml

@@ -100,7 +100,7 @@ Grenade:
 			None: 50
 			Wood: 100
 			Light: 25
-			Heavy: 5
+			Heavy: 25
 		DamageTypes: Prone50Percent, TriggerProne, SmallExplosionDeath
 	Warhead@2Smu: LeaveSmudge
 		SmudgeType: Crater