docs: add bytedance/seedance-2-5 (#462)

Author: Lookoff-AIMLAPI

docs/SUMMARY.md

@@ -483,6 +483,7 @@
     * [Seedance 2.0 Fast](api-references/video-models/bytedance/seedance-2.0-fast.md)
     * [Seedance 2.0 Mini](api-references/video-models/ByteDance/seedance-2-0-mini.md)
     * [Seedance 2.5](api-references/video-models/ByteDance/dreamina-seedance-2-5.md)
+    * [Seedance 2.5](api-references/video-models/ByteDance/seedance-2.5.md)
   * [Google](api-references/video-models/google/README.md)
     * [Veo 2 (Text-to-Video)](api-references/video-models/google/veo2-text-to-video.md)
     * [Veo 2 (Image-to-Video)](api-references/video-models/google/veo2-image-to-video.md)