minor #894 [Website] Update the models used in the code sample (javiereguiluz, OskarStark)

This PR was merged into the main branch.

Discussion
----------

[Website] Update the models used in the code sample

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        | -
| License       | MIT

Related to the great change made in #891. I propose to always show the latest and greatest models, because otherwise some visitors could think that we're outdated.

Commits
-------

6b914bd Update ai.symfony.com/templates/homepage.html.twig
85ec755 [Website] Update the models used in the code sample

Author: OskarStark

ai.symfony.com/templates/homepage.html.twig

@@ -32,7 +32,7 @@
                         {% set model_typed = stimulus_controller('typed', {
                             loop: true,
                             cursorChar: '|',
-                            strings: ['gpt-4o', 'mistral-large-latest', 'gemini-2.0-flash', 'claude-sonnet-4-0'],
+                            strings: ['gpt-5.1', 'mistral-large-latest', 'gemini-3-pro-preview', 'claude-sonnet-4-5'],
                         }) %}
                         <pre class="terminal"><code><span class="variable">$platform</span> = <span class="title class_">PlatformFactory</span>::<span class="title function_ invoke__">create</span>(...);
 <span class="variable">$agent</span> = <span class="keyword">new</span> <span class="title class_">Agent</span>(<span class="variable">$platform</span>, <span class="string">'</span><span class="string" {{ model_typed|raw }}></span><span class="string">'</span>)