chore: update OpenRouter model in translation diff workflow

Author: selul

.github/workflows/diff-translations.yml

@@ -46,7 +46,7 @@ jobs:
         with:
           fail-on-changes: 'true'
           openrouter-key: ${{ secrets.OPEN_ROUTER_API_KEY }}
-          openrouter-model: 'google/gemini-2.5-flash-lite-preview-09-2025'
+          openrouter-model: 'google/gemini-2.5-flash'
           base-pot-file: 'neve-base/languages/neve.pot'
           target-pot-file: 'neve-head/languages/neve.pot'
           github-token: ${{ secrets.BOT_TOKEN }}