This PR updates the links to the guides and documentation for integrating Cohere with various vector search engines and databases. The changes aim to provide clearer and more concise instructions for users, making it easier to find the relevant resources.

• Chroma: The link to the Chroma documentation has been updated to a more direct link, making it easier for users to access the information.
• Milvus: The link to the Milvus documentation has been updated to a more specific guide, providing a clearer path for users to follow.
• MongoDB Atlas Vector Search: The link to the MongoDB documentation has been updated to a more concise guide, making it easier for users to find the relevant information.
• Pinecone: The link to the Pinecone documentation has been updated to a step-by-step guide, providing a more detailed and structured resource for users.
• Qdrant: The link to the Qdrant documentation has been updated to a more specific guide, making it easier for users to find the relevant information.
• Redis: The link to the Redis documentation has been updated to include a guide, providing additional context and instructions for users.
• Vespa: The link to the Vespa documentation has been updated to a more specific post, making it easier for users to find the relevant information.
• Weaviate: The link to the Weaviate documentation has been updated to include a more detailed guide, providing additional context and instructions for users.
• Zilliz Cloud: The link to the Zilliz Cloud documentation has been updated to include a quickstart guide, providing a more comprehensive resource for users.