Fixes Exosuit Stress Failure not working (#84776)

## About The Pull Request

Closes #84762
It was missing total_requirement which defaulted to 0 and made it not
generate properly.

## Changelog
🆑
fix: Exosuit Stress Failure experiment now works
/🆑

code/modules/experisci/experiment/experiments.dm

@@ -326,6 +326,7 @@
 	name = "Exosuit Materials: Stress Failure Test"
 	description = "Your exosuit fabricators allow for rapid production on a small scale, but the structural integrity of created parts is inferior to more traditional means."
 	exp_tag = "Scan"
+	total_requirement = 2
 	possible_types = list(/obj/vehicle/sealed/mecha)
 	///Damage percent that each mech needs to be at for a scan to work.
 	var/damage_percent