Revise Google API reference in Chapter 5

Updated the reference for obtaining Google API to official documentation.

docs/chapter5/Chapter5-Building-Agents-with-Low-Code-Platforms.md

@@ -763,7 +763,7 @@ return [
 
 Computers cannot directly understand text and need to convert it into vectors. We use the `Embeddings` node to complete this "translation" work.
 
-- **Node**: `Embeddings Google Gemini`, select model as `gemini-embedding-exp-03-07`. Here we use Google API for demonstration; if you don't know how to obtain Google API, you can refer to Section 5.5.3.
+- **Node**: `Embeddings Google Gemini`, select model as `gemini-embedding-exp-03-07`. Here we use Google API for demonstration; if you don't know how to obtain Google API, you can refer to the official documentation.
 - **Configuration**: Connect it after the `Code` node, and it will automatically convert the text passed from upstream into vector data.
 
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