ARES reception bell unique description and longer cooldown (#6271)

# About the pull request

- Gives the ARES reception bell a unique description to let people know
that it notifies WJs.
- Increases the cooldown of the ARES reception bell from 5 to 60
seconds.

**!! fyi I have no idea what changelog tags would be appropriate so I
just went with QOL. Feel free to change if needed. !!**

# Explain why it's good for the game

Increased cooldown is to prevent spam. Happened on a previous round and
was quite annoying. I don't see a need to be able to send an
announcement every 5 seconds.


# 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

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:cl: XQ
qol: Updated the ARES reception bell's description to inform players it
notifies Working Joes when rung.
qol: Increased the ARES reception bell's cooldown from 5 to 60 seconds.
/:cl:

<!-- Both :cl:'s are required for the changelog to work! -->

code/modules/paperwork/desk_bell.dm

@@ -96,6 +96,8 @@
 
 /obj/item/desk_bell/ares
 	name = "AI core reception bell"
+	desc = "The cornerstone of any customer service job. This one is linked to ARES and will notify any active Working Joes upon being rung."
+	ring_cooldown_length = 60 SECONDS // Prevents spam
 
 /obj/item/desk_bell/ares/ring_bell(mob/living/user)
 	if(broken_ringer)