Add missing people panel properties to base theme

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

zed/src/people_panel.rs

@@ -61,7 +61,7 @@ impl PeoplePanel {
                     .with_child(
                         Label::new(
                             collaborator.user.github_login.clone(),
-                            theme.people_panel.collaborator_username.clone(),
+                            theme.people_panel.host_username.clone(),
                         )
                         .boxed(),
                     )

zed/src/theme.rs

@@ -108,7 +108,7 @@ pub struct ChatPanel {
 pub struct PeoplePanel {
     #[serde(flatten)]
     pub container: ContainerStyle,
-    pub collaborator_username: TextStyle,
+    pub host_username: TextStyle,
     pub worktree_name: ContainedText,
     pub worktree_host_avatar: ImageStyle,
     pub worktree_guest_avatar: ImageStyle,