test/distro/rhel84: invert condition

I'm sorry, I need to extend this condition and my brain isn't powerful enough
to reason about complex negative conditions.

Not a functional change.

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

internal/distro/rhel84/distro_test.go

@@ -533,12 +533,12 @@ func TestRhel84_GetArch(t *testing.T) {
 		t.Run(dist.name, func(t *testing.T) {
 			for _, a := range arches {
 				actualArch, err := dist.distro.GetArch(a.name)
-				if !a.errorExpected {
-					assert.Equal(t, a.name, actualArch.Name())
-					assert.NoError(t, err)
-				} else {
+				if a.errorExpected {
 					assert.Nil(t, actualArch)
 					assert.Error(t, err)
+				} else {
+					assert.Equal(t, a.name, actualArch.Name())
+					assert.NoError(t, err)
 				}
 			}
 		})