Rename BellBadged to BellDot (#6820)

This PR renames the `BellBadged` icon to `BellDot` to be a bit clearer
as to what its contents are.

Release Notes:

- N/A

crates/collab_ui/src/notification_panel.rs

@@ -685,7 +685,7 @@ impl Panel for NotificationPanel {
             return Some(IconName::Bell);
         }
 
-        Some(IconName::BellBadged)
+        Some(IconName::BellDot)
     }
 
     fn icon_tooltip(&self, _cx: &WindowContext) -> Option<&'static str> {

crates/ui/src/components/icon.rs

@@ -39,7 +39,7 @@ pub enum IconName {
     Bell,
     BellOff,
     BellRing,
-    BellBadged,
+    BellDot,
     Bolt,
     CaseSensitive,
     Check,
@@ -131,7 +131,7 @@ impl IconName {
             IconName::Bell => "icons/bell.svg",
             IconName::BellOff => "icons/bell_off.svg",
             IconName::BellRing => "icons/bell_ring.svg",
-            IconName::BellBadged => "icons/bell_badged.svg",
+            IconName::BellDot => "icons/bell_dot.svg",
             IconName::Bolt => "icons/bolt.svg",
             IconName::CaseSensitive => "icons/case_insensitive.svg",
             IconName::Check => "icons/check.svg",