message: fix: fine tune time pivot chart tooltip
diff: @@ -175,7 +175,7 @@ export function generateTimePivotTooltip(d, xFormatter, yFormatter) {
  if (series.key === 'current') {
  label = series.key;
  } else {
  - label = `${series.key} of the selected frequence`;
  + label = `${series.key} of the selected frequency:`;
  }
  tooltip +=
  "<tr><td class='legend-color-guide'>" +
  