docs: add zhipu/glm-5-2-fast-preview (#423)

Author: Lookoff-AIMLAPI

docs/SUMMARY.md

@@ -333,6 +333,7 @@
   * [Zhipu AI](api-references/text-models-llm/Zhipu-AI/README.md)
     * [Glm 5.2](api-references/text-models-llm/Zhipu-AI/glm-5.2.md)
     * [Glm 5.2 Fast Preview](api-references/text-models-llm/Zhipu-AI/glm-5.2-fast-preview.md)
+    * [GLM 5.2 Fast Preview](api-references/text-models-llm/Zhipu-AI/glm-5-2-fast-preview.md)
 * [Image Models](api-references/image-models/README.md)
   * [Alibaba Cloud](api-references/image-models/alibaba-cloud/README.md)
     * [Qwen Image](api-references/image-models/alibaba-cloud/qwen-image.md)