[Site] Fix examples from Translator page

Author: Kocal

ux.symfony.com/templates/ux_packages/translator/_translator_demo_block.html.twig

@@ -8,9 +8,9 @@
         <div class="Terminal Terminal_body">
             <div class="Terminal_content">
                 <pre data-translator-demo-block-target="code">
-<small><span class="hl-keyword">import</span> { trans, <span class="hl-variable constant_">{{ message }}</span> } <span class="hl-keyword">from</span> '<span class="hl-value">../translator</span>';</small>
+<small><span class="hl-keyword">import</span> { trans } <span class="hl-keyword">from</span> '<span class="hl-value">../translator</span>';</small>
 
-<span class="hl-property function_">trans</span>(<span class="hl-variable constant_">{{ message }}</span>{% if parameters %}, {
+<span class="hl-property function_">trans</span>(<span class="hl-value">'{{ message }}'</span>{% if parameters %}, {
 {% for name, value in parameters %} {% set is_string = not (value matches '/^[\\d\\.]+$/') %}
     <span class="hl-property">{{ name }}</span>:&nbsp;
 {{- name ends with 'date' ? '<span class="hl-keyword">new</span> <span class="hl-property class_">Date</span>(' }}{{- is_string ? "'" }}<span class="hl-value" data-code-parameter="{{ name }}">{{ value }}</span>{{ is_string ? "'" }}{{ name ends with 'date' ? ')' }},