ERTs now spawn with ion jetpacks (#4461)

## About The Pull Request

ERTs get the ion jetpack module now. Waow
## Why It's Good For The Game

I've heard complaining that ERTs are weak. Im not super sure about that
myself, but something that continuously confused me is their lack of
space maneuverability. They're an all-rounder team being sent to a SPACE
STATION. Why don't they get jetpacks? From what I've observed, ERTs just
get jetpacks from robotics anyways. So why not just give it to them?
## Proof Of Testing
<details>
<summary>Screenshots/Videos</summary>

</details>

## Changelog
🆑
add: ERTs now spawn with jetpacks
/🆑

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Co-authored-by: LT3 <83487515+lessthnthree@users.noreply.github.com>

code/modules/mod/mod_types.dm

@@ -465,7 +465,13 @@
 		/obj/item/mod/module/magnetic_harness,
 		/obj/item/mod/module/flashlight,
 		/obj/item/mod/module/quick_cuff,
+		/obj/item/mod/module/jetpack // BUBBER EDIT ADDITION
 	)
+	// BUBBER EDIT ADDITION START - jetpack
+	default_pins = list(
+		/obj/item/mod/module/jetpack
+	)
+	// BUBBER EDIT ADDITION END
 	/// The insignia type, insignias show what sort of member of the ERT you're dealing with.
 	var/insignia_type = /obj/item/mod/module/insignia
 	/// Additional module (or modules if list) we add, as a treat.