sam missile immunity (#3167)

## Description:

added sam missile immunity (was missing from the immunity list)

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

src/core/execution/NukeExecution.ts

@@ -324,7 +324,8 @@ export class NukeExecution implements Execution {
         unit.type() !== UnitType.AtomBomb &&
         unit.type() !== UnitType.HydrogenBomb &&
         unit.type() !== UnitType.MIRVWarhead &&
-        unit.type() !== UnitType.MIRV
+        unit.type() !== UnitType.MIRV &&
+        unit.type() !== UnitType.SAMMissile
       ) {
         if (this.mg.euclideanDistSquared(this.dst, unit.tile()) < outer2) {
           unit.delete(true, this.player);