Fix URL in instructions (#20993)

The URL is in a parenthesis which our Markdown parser interprets as part of the URL. Furthermore, this is an example URL which isn't meant to be clickable, so escaping with backticks is more accurate.

Author: astorije

beyondtrust_password_safe/README.md

@@ -137,7 +137,7 @@ sudo -u dd-agent -- datadog-agent integration install datadog-beyondtrust_passwo
 
    | Parameters                        | Description                                                                          |
    | --------------------------------- | ------------------------------------------------------------------------------------ |
-   | API Base Endpoint                 | API Base Endpoint used to make requests to the Password Safe public API (Example: https://beyondtrustcloud.com/BeyondTrust/api/public/v3).    |
+   | API Base Endpoint                 | API Base Endpoint used to make requests to the Password Safe public API (Example: `https://beyondtrustcloud.com/BeyondTrust/api/public/v3`).    |
    | Client ID                         | Client ID of the application user present in BeyondTrust Password Safe.              |
    | Client Secret                     | Client Secret of the application user present in BeyondTrust Password Safe.          |