Cybersun cap sprite no longer defaults to black cap. (#2821)

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## About The Pull Request
Title. Also means it can be flipped without breaking now.
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Oversights bad.
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## Changelog

:cl:
fix: Cybersun cap no longer defaults to black cap's sprite.
/:cl:

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code/modules/clothing/head/soft_caps.dm

@@ -140,7 +140,7 @@
 	name = "cybersun agent cap"
 	desc = "A black baseball hat emblazoned with a reflective Cybersun patch."
 	icon_state = "agentsoft"
-	soft_type = "black"
+	soft_type = "agent"
 	dog_fashion = null
 
 /obj/item/clothing/head/soft/cybersun/medical