[Admin] Fix hardcoded hello (#17150)

| Q               | A
|-----------------|-----
| Branch?         | 2.0 
| Bug fix?        | yes
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Related tickets | 
| License         | MIT

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src/Sylius/Bundle/AdminBundle/templates/shared/components/navbar/user.html.twig

@@ -11,7 +11,7 @@
             {% endif %}
         </div>
         <div class="d-none d-xl-block ps-2">
-            <div class="mb-1 small text-muted">Hello</div>
+            <div class="mb-1 small text-muted">{{ 'sylius.ui.hello'|trans }}</div>
             <div>{{ user.firstName|default(user.username) }}</div>
         </div>
     </div>