Fix hang when opening URL in first browser window (#11961)

If opening a url opens the first browser window the call does not return
completely blocking the ui until the browser window is closed. Using
spawn instead of status does not block, but we will loose the exitstatus
of the browser window.

Release Notes:

- N/A

crates/gpui/src/platform/linux/platform.rs

@@ -492,7 +492,7 @@ pub(super) fn open_uri_internal(uri: &str, activation_token: Option<&str>) {
         if let Some(token) = activation_token {
             command.env("XDG_ACTIVATION_TOKEN", token);
         }
-        match command.status() {
+        match command.spawn() {
             Ok(_) => return,
             Err(err) => last_err = Some(err),
         }