fix minor issues with code example and sign-up link (#19683)

Author: harshil1712

src/content/docs/ai-gateway/integrations/aig-workers-ai-binding.mdx

@@ -89,6 +89,7 @@ export default {
 					skipCache: true, // Optional: Skip cache if needed
 				},
 			},
+		);
 
 		// Return the AI response as a JSON object
 		return new Response(JSON.stringify(response), {

src/content/docs/ai-gateway/tutorials/create-first-aig-workers.mdx

@@ -12,7 +12,7 @@ This tutorial guides you through creating your first AI Gateway using Workers AI
 
 ## Sign up and log in
 
-1. **Sign up**: If you do not have a Cloudflare account, [sign up](https:/cloudflare.com/sign-up).
+1. **Sign up**: If you do not have a Cloudflare account, [sign up](https://cloudflare.com/sign-up).
 2. **Log in**: Access the Cloudflare dashboard by logging in to the [Cloudflare dashboard](https://dash.cloudflare.com/login).
 
 ## Create gateway