fix(battery): too many decimals in battery percent

Co-authored-by: Lucas Ribeiro <estg-lnr@tce.rs.gov.br>

cosmic-applet-battery/src/app.rs

@@ -430,7 +430,7 @@ impl cosmic::Application for CosmicBatteryApplet {
     fn view_window(&self, _id: window::Id) -> Element<Message> {
         let name = text(fl!("battery")).size(14);
         let description = text(if !self.on_battery {
-            format!("{}%", self.battery_percent)
+            format!("{:.0}%", self.battery_percent)
         } else {
             format!(
                 "{} {} ({:.0}%)",