Tweak "About" panel in the demo slightly

Author: emilk

crates/egui_demo_lib/src/demo/about.rs

@@ -49,9 +49,11 @@ impl super::View for About {
             ui.spacing_mut().item_spacing.x = 0.0;
             ui.label("egui development is sponsored by ");
             ui.hyperlink_to("Rerun.io", "https://www.rerun.io/");
-            ui.label(", a startup building an SDK for visualizing streams of multimodal data");
+            ui.label(", a startup building an SDK for visualizing streams of multimodal data.");
         });
 
+        ui.add_space(12.0);
+
         ui.vertical_centered(|ui| {
             ui.add(crate::egui_github_link_file!());
         });