Change the icon of the pan-and-zoom demo

crates/egui_demo_lib/src/demo/pan_zoom.rs

@@ -11,7 +11,7 @@ impl Eq for PanZoom {}
 
 impl super::Demo for PanZoom {
     fn name(&self) -> &'static str {
-        "🗖 Pan Zoom"
+        "🔍 Pan Zoom"
     }
 
     fn show(&mut self, ctx: &egui::Context, open: &mut bool) {