Adapt to rocq-prover/rocq#11368 (Turn trailing implicit warning into an error)

Author: SimonBoulier

tests/Test.v

@@ -82,7 +82,7 @@ End Lists.
 
 (** Exporting list notations and tactics *)
 
-Arguments nil [A].
+Arguments nil {A}.
 Infix "::" := cons (at level 60, right associativity) : list_scope.
 Infix "++" := app (right associativity, at level 60) : list_scope.