Fix forgotten mirv cursor (#2156)

## Description:

Forgot to show cross cursor for mirv

## 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:

Mr.Box

src/client/graphics/layers/StructureDrawingUtils.ts

@@ -18,9 +18,10 @@ export const STRUCTURE_SHAPES: Partial<Record<UnitType, ShapeType>> = {
   [UnitType.DefensePost]: "octagon",
   [UnitType.SAMLauncher]: "square",
   [UnitType.MissileSilo]: "triangle",
+  [UnitType.Warship]: "cross",
   [UnitType.AtomBomb]: "cross",
   [UnitType.HydrogenBomb]: "cross",
-  [UnitType.Warship]: "cross",
+  [UnitType.MIRV]: "cross",
 };
 export const LEVEL_SCALE_FACTOR = 3;
 export const ICON_SCALE_FACTOR_ZOOMED_IN = 3.5;