Add AmazonBedrockEmbeddingFunction to docs

[philipithomas]

Describe the problem

Source code: : https://github.com/chroma-core/chroma/blob/main/chromadb/utils/embedding_functions/amazon_bedrock_embedding_function.py

Not currently in docs.

Describe the proposed solution

Alternatives considered

No response

Importance

would make my life easier

Additional Information