fix: update Gemini model to gemini-3.1-flash-lite in GeminiFixer

bump version to 2.9.2

composer.json

@@ -12,6 +12,7 @@
         "yaknet"
     ],
     "homepage": "https://forum.yak.net.tr",
+    "version": "2.9.2",
     "type": "library",
     "license": "MIT",
     "authors": [

src/AI/GeminiFixer.php

@@ -45,7 +45,7 @@ FIX: [Only the corrected HTML snippet]
 PROMPT;
 
         try {
-            $result = $this->client->generativeModel('gemini-2.5-flash')->generateContent($prompt);
+            $result = $this->client->generativeModel('gemini-3.1-flash-lite')->generateContent($prompt);
             return trim($result->text());
         } catch (\Throwable $e) {
             return "AI Düzeltme Hatası: " . $e->getMessage();