Change tooltip wording to "% of shown items" to be more universal

Signed-off-by: DL6ER <dl6er@dl6er.de>

scripts/pi-hole/js/index.js

@@ -813,7 +813,7 @@ function doughnutTooltip(tooltipItems, data) {
     dataset.data[tooltipItems.index].toFixed(1) +
     "% of all queries<br>- " +
     ((dataset.data[tooltipItems.index] * 100) / (total - scale)).toFixed(1) +
-    "% of displayed query types"
+    "% of shown items"
   );
 }