minor fix

Author: daisyfaithauma

src/content/docs/ai-gateway/providers/openai.mdx

@@ -25,7 +25,7 @@ https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/responses
 
 ## URL structure
 
-When making requests to OpenAI, replace `https://api.openai.com/v1` in the URL you’re currently using with `https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai`.
+When making requests to OpenAI, replace `https://api.openai.com/v1` in the URL you are currently using with `https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai`.
 
 ## Prerequisites