External links and cleanup

Author: pwseg

src/unify/profile-api.md

@@ -59,7 +59,7 @@ Your access token enables you to call the Profile API and access customer data.
 > To query phone numbers that contain a plus sign (`+`), insert the escape characters `%2B` in place of the plus sign.
 > For example, if a `phone_number` identifier has the value `+5555550123`, enter `phone_number:%2B5555550123` in your query.
 > 
-> If the field being used within the Profile API endpoint contains a value with a non-alphanumeric character, then the Profile API may respond with 500 error. In this case, please reference [this W3 doc](https://www.w3schools.com/tags/ref_urlencode.ASP#:~:text=ASCII%20Encoding%20Reference,%25C3%25BF), which lists the escape characters to replace the non-alphanumeric character in the Profile API endpoint with, so that the Profile API will respond with a 200 Success.
+> If the field you're using within the Profile API endpoint contains a value with a non-alphanumeric character, then the Profile API may respond with `500` error. In this case, see [W3's ASCII Encoding Refernece](https://www.w3schools.com/tags/ref_urlencode.ASP#:~:text=ASCII%20Encoding%20Reference,%25C3%25BF){:target="_blank"}, which lists the escape characters you can use to replace the non-alphanumeric character in the Profile API endpoint so that the Profile API will respond with a `200 Success`.
 
 ### Query the user's event traits