refactor: Use stream composition for finding TAG spotters

Author: Saklad5

megamek/src/megamek/common/actions/WeaponAttackAction.java

@@ -555,11 +555,11 @@ private static ToHitData toHitCalc(Game game, int attackerId, Targetable target,
                             || (atype.getAmmoType() == AmmoType.T_NLRM)
                             || (atype.getAmmoType() == AmmoType.T_MEK_MORTAR))
                     && (munition.contains(AmmoType.Munitions.M_SEMIGUIDED))) {
-                for (TagInfo ti : game.getTagInfo()) {
-                    if (target.getId() == ti.target.getId()) {
-                        spotter = game.getEntity(ti.attackerId);
-                    }
-                }
+                spotter = game.getTagInfo().stream()
+                    .filter(ti -> target.getId() == ti.target.getId())
+                    .findAny()
+                    .map(ti -> game.getEntity(ti.attackerId))
+                    .orElse(null);
             }
         }