Add doc for ZhiPuAi embedding dimensions option

Signed-off-by: Assassinxc <[email protected]>

Author: Assassinxc

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/embeddings/zhipuai-embeddings.adoc

@@ -91,7 +91,7 @@ The prefix `spring.ai.zhipuai.embedding` is property prefix that configures the
 | spring.ai.zhipuai.embedding.base-url   | Optional overrides the spring.ai.zhipuai.base-url to provide embedding specific url | -
 | spring.ai.zhipuai.embedding.api-key    | Optional overrides the spring.ai.zhipuai.api-key to provide embedding specific api-key  | -
 | spring.ai.zhipuai.embedding.options.model      | The model to use      | embedding-2
-| spring.ai.zhipuai.embedding.options.dimensions      | The number of dimensions      | -
+| spring.ai.zhipuai.embedding.options.dimensions      | The number of dimensions, the default value is 2048 when the model is embedding-3 | -
 |====
 
 NOTE: You can override the common `spring.ai.zhipuai.base-url` and `spring.ai.zhipuai.api-key` for the `ChatModel` and `EmbeddingModel` implementations.