fix Cyerce's frag keeping owner velocity (#6527)

core/src/mindustry/content/UnitTypes.java

@@ -2040,6 +2040,7 @@ public class UnitTypes implements ContentList{
                         weaveMag = 4;
                         weaveScale = 4;
                         lifetime = 60f;
+                        keepVelocity = false;
                         shootEffect = Fx.shootHeal;
                         smokeEffect = Fx.hitLaser;
                         splashDamage = 13f;