Makes fingerprint scanner description newbie-friendly (#6989)

# About the pull request

Changes fingerprint scanner description to help new players along with
how to use it. Removes the flavor text about incorrect results as that's
not how the item functions (therefore a bit misleading.)

# Explain why it's good for the game

makes game slightly more newbie friendly


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
qol: fingerprint scanner description is more newbie-friendly
/:cl:

code/game/objects/items/devices/clue_scanner.dm

@@ -1,6 +1,6 @@
 /obj/item/device/clue_scanner
 	name = "forensic scanner"
-	desc = "A modern handheld scanner to gather fingerprints. Guaranteed increase of effectivity and almost perfect accuracy of results. DISCLAIMER: Incorrect results are not covered by insurance."
+	desc = "A modern handheld scanner to gather fingerprints. Must be analyzed at a security records terminal after prints are gathered."
 	icon_state = "forensic1"
 	w_class = SIZE_MEDIUM
 	item_state = "electronic"