Add also the pro TTS model

Author: lochmueller

src/platform/src/Bridge/Gemini/ModelCatalog.php

@@ -154,6 +154,14 @@ public function __construct(array $additionalModels = [])
                     Capability::TEXT_TO_SPEECH,
                 ],
             ],
+            'gemini-2.5-pro-preview-tts' => [
+                'class' => Gemini::class,
+                'capabilities' => [
+                    Capability::INPUT_MESSAGES,
+                    Capability::OUTPUT_AUDIO,
+                    Capability::TEXT_TO_SPEECH,
+                ],
+            ],
             'gemini-embedding-exp-03-07' => [
                 'class' => Embeddings::class,
                 'capabilities' => [Capability::INPUT_MULTIPLE],