fix elixir_burgers_shock.jl (#2222)

* fix elixir_burgers_shock.jl

* update test values

Author: ranocha

examples/tree_1d_dgsem/elixir_burgers_shock.jl

@@ -19,7 +19,7 @@ volume_flux = flux_ec
 surface_flux = flux_lax_friedrichs
 
 volume_integral = VolumeIntegralShockCapturingHG(indicator_sc;
-                                                 volume_flux_dg = surface_flux,
+                                                 volume_flux_dg = volume_flux,
                                                  volume_flux_fv = surface_flux)
 
 solver = DGSEM(basis, surface_flux, volume_integral)

test/test_tree_1d_burgers.jl

@@ -40,8 +40,8 @@ end
 
 @trixi_testset "elixir_burgers_shock.jl" begin
     @test_trixi_include(joinpath(EXAMPLES_DIR, "elixir_burgers_shock.jl"),
-                        l2=[0.4422505602587537],
-                        linf=[1.0000000000000009])
+                        l2=[0.4429871964104191],
+                        linf=[1.007778754747701])
     # Ensure that we do not have excessive memory allocations
     # (e.g., from type instabilities)
     let