Fix issue with azure api base

Author: crmne

spec/support/rubyllm_configuration.rb

@@ -8,7 +8,7 @@
   before do
     RubyLLM.configure do |config|
       config.anthropic_api_key = ENV.fetch('ANTHROPIC_API_KEY', 'test')
-      config.azure_api_base = ENV.fetch('AZURE_API_BASE', 'https://example.com')
+      config.azure_api_base = ENV.fetch('AZURE_API_BASE', 'https://rubyllm.services.ai.azure.com/')
       config.azure_api_key = ENV.fetch('AZURE_API_KEY', 'test')
       config.bedrock_api_key = ENV.fetch('AWS_ACCESS_KEY_ID', 'test')
       config.bedrock_region = 'us-west-2'