Rebalances a vast oversight with one of the game's weapons (#74283)

## About The Pull Request
Makes sure the game is fairly balanced again.
## Why It's Good For The Game
Honestly I'm surprised this weapon went unchanged for so long with no
downsides.
## Changelog
🆑 Wallem
balance: Fixes a glaring oversight with the entrenching tool's
balancing.
/🆑

code/modules/mining/equipment/mining_tools.dm

@@ -204,6 +204,7 @@
 	. = ..()
 	. += span_notice("Use in hand to switch configuration.")
 	. += span_notice("It functions as a [tool_behaviour] tool.")
+	. += span_danger("<i>This weapon has no random critical hits.</i>")
 
 /obj/item/trench_tool/update_icon_state()
 	. = ..()