Improve key name for Azure OpenAI API version

Author: Moeki Kawakami

README.md

@@ -30,8 +30,8 @@ require 'weaviate'
 client = Weaviate::Client.new(
     url: 'https://some-endpoint.weaviate.network',  # Replace with your endpoint
     api_key: '', # Weaviate API key
-    model_service: :openai, # Service that will be used to generate vectors. Possible values: :openai, :azure, :cohere, :huggingface
-    model_service_api_key: 'xxxxxxx' # Either OpenAI, Azure, Cohere or Hugging Face API key
+    model_service: :openai, # Service that will be used to generate vectors. Possible values: :openai, :azure_openai, :cohere, :huggingface
+    model_service_api_key: 'xxxxxxx' # Either OpenAI, Azure OpenAI, Cohere or Hugging Face API key
 )
 ```
 

lib/weaviate/client.rb

@@ -12,7 +12,7 @@ class Client
 
     API_KEY_HEADERS = {
       openai: "X-OpenAI-Api-Key",
-      azure: "X-Azure-Api-Key",
+      azure_openai: "X-Azure-Api-Key",
       cohere: "X-Cohere-Api-Key",
       huggingface: "X-HuggingFace-Api-Key"
     }