Update unit.jl

Author: DilumAluthge

test/unit.jl

@@ -30,6 +30,7 @@ end
     # This test is not relevant for Julia 1.6+
   else
     params = Dict(:env => ["foo" => "bar"])
+    SlurmClusterManager.warn_if_unexpected_params(params)
     @test_logs(
       (:warn, "The user provided the `env` kwarg, but SlurmClusterManager.jl's support for the `env` kwarg requires Julia 1.6 or later"),
       SlurmClusterManager.warn_if_unexpected_params(params),