Tengxin-Li

Add code snippet for embeddings normalization

1

## Description Add code snippet for embeddings normalization, so that the magnitude of the array is always 1. ## Checklist - [X] I have followed [Sample Guidelines from AUTHORING_GUIDE.MD](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/main/AUTHORING_GUIDE.md) -...