Add: parallel on 2 unit tests

src/go/pt-galera-log-explainer/display/timelinecli_test.go

@@ -8,6 +8,7 @@ import (
 )
 
 func TestTransitionSeparator(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		keys          []string
 		oldctxs, ctxs map[string]types.LogCtx

src/go/pt-galera-log-explainer/regex/file_test.go

@@ -5,6 +5,7 @@ import (
 )
 
 func TestFileType(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		inputline     string
 		inputoperator bool