fix(typo): "equipement" to "equipment" in tooltips.txt (endless-sky#9407

)

data/_ui/tooltips.txt

@@ -895,7 +895,7 @@ tip "tracking:"
 	`This projectile's ability to maintain its target lock.`
 
 tip "optical tracking:"
-	`This projectile's ability to maintain an optical target lock, which depends on the size of the target; negatively affected by any potential optical jamming equipement.`
+	`This projectile's ability to maintain an optical target lock, which depends on the size of the target; negatively affected by any potential optical jamming equipment.`
 
 tip "infrared tracking:"
 	`This projectile's ability to maintain an infrared target lock, which depends on the target ship's heat level and distance from the missile; IR-guided missiles become more accurate the closer they are to their targets.`