[FIX] im_livechat: fix env._t leftover

Commit [1] replaced all uses of env._t by calling the _t function
directly, and removed _t from the env. This commit adapts a
forgotten occurrence.

c07181b20b

opw 3664779

closes odoo/odoo#149176

Related: odoo/enterprise#54195
Signed-off-by: Samuel Degueldre (sad) <sad@odoo.com>

addons/im_livechat/static/src/embed/external/boot.js

@@ -7,6 +7,7 @@ import { serverUrl } from "@im_livechat/embed/common/livechat_data";
 import { mount, whenReady } from "@odoo/owl";
 
 import { templates } from "@web/core/assets";
+import { _t } from "@web/core/l10n/translation";
 import { MainComponentsContainer } from "@web/core/main_components_container";
 import { registry } from "@web/core/registry";
 import { makeEnv, startServices } from "@web/env";
@@ -24,7 +25,7 @@ import { session } from "@web/session";
     await mount(MainComponentsContainer, target, {
         env,
         templates,
-        translateFn: env._t,
+        translateFn: _t,
         dev: env.debug,
     });
 })();