Unskip test

tests/server_test.go

@@ -7826,9 +7826,6 @@ func TestServer_Query_ShowMeasurementExactCardinality(t *testing.T) {
 }
 
 func TestServer_Query_ShowTagKeys(t *testing.T) {
-	// TODO(benbjohnson): To be addressed in upcoming PR.
-	t.SkipNow()
-
 	t.Parallel()
 	s := OpenServer(NewConfig())
 	defer s.Close()