[NO GBP] You can actually check what fishes can be caught while examining a spot now (#81772)

## About The Pull Request
I've forgot to register the examine more signal since I moved the info
there.

## Why It's Good For The Game
Title.

## Changelog
N/A . I doubt anyone will notice the blunder so soon.

code/datums/components/fishing_spot.dm

@@ -16,6 +16,7 @@
 	RegisterSignal(parent, COMSIG_ATOM_ATTACKBY, PROC_REF(handle_attackby))
 	RegisterSignal(parent, COMSIG_FISHING_ROD_CAST, PROC_REF(handle_cast))
 	RegisterSignal(parent, COMSIG_ATOM_EXAMINE, PROC_REF(on_examined))
+	RegisterSignal(parent, COMSIG_ATOM_EXAMINE_MORE, PROC_REF(on_examined_more))
 
 /datum/component/fishing_spot/Destroy()
 	fish_source = null