applets/batterymonitor: make string translatable

This commit makes the string "No Batteries Available" translatable.

BUG: 454114


(cherry picked from commit 7f308065a7)

applets/batterymonitor/package/contents/ui/main.qml

@@ -158,7 +158,7 @@ Item {
         }
 
         if (batteries.count === 0) {
-            parts.push("No Batteries Available");
+            parts.push(i18n("No Batteries Available"));
         } else if (remainingTime > 0) {
             const remainingTimeString = KCoreAddons.Format.formatDuration(remainingTime, KCoreAddons.FormatTypes.HideSeconds);
             if (pmSource.data["Battery"]["State"] === "FullyCharged") {