Added renewal url in check license and updated readme

README.md

@@ -156,11 +156,19 @@ GET /products/{product_id}/check_license?license=LICENSE_KEY
     "status": "active",
     "expires": "2024-12-31",
     "customer_name": "John Doe",
-    "customer_email": "john@example.com"
+    "customer_email": "john@example.com",
+    "renewal_url": "https://example.com/renew?license={license_code}&email={email}"
   }
 }
 ```
 
+The `renewal_url` field is optional in the license verification response. When present and the license status is `expired`, a renewal link is displayed on the admin license page. The URL supports two placeholders that are replaced automatically:
+
+- `{license_code}` — replaced with the stored license key
+- `{email}` — replaced with the `buyer_email` from the license data
+
+A static URL without placeholders (e.g., `https://example.com/renew`) is also supported.
+
 ### Ping Endpoint
 
 ```

tests/IntegrationLicenseTest.php

@@ -231,4 +231,5 @@ public function get_license_renewal_url_returns_url_without_placeholders() {
 			$integration->get_license_renewal_url()
 		);
 	}
+
 }