Adds Endpoint Exceptions privilege to serverless (#1588)

Contributes to #1517 by
documenting the Endpoint Exceptions privilege for serverless. The
privilege is already available in serverless and is planned for Stack
release in 9.1.

9.1 doc updates will be handled separately, closer to release date, to
avoid merging in changes prematurely.

Preview: [Elastic Defend feature
privileges](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/1588/solutions/security/configure-elastic-defend/elastic-defend-feature-privileges)

Author: natasha-moore-elastic

solutions/security/configure-elastic-defend/elastic-defend-feature-privileges.md

@@ -40,6 +40,7 @@ For each of the following sub-feature privileges, select the type of access you
 | --- | --- |
 | **Endpoint List** | Access the [Endpoints](/solutions/security/manage-elastic-defend/endpoints.md) page, which lists all hosts running {{elastic-defend}}, and associated integration details. |
 | **Automatic Troubleshooting** |Access [Automatic Troubleshooting](/solutions/security/manage-elastic-defend/identify-antivirus-software-on-hosts.md) to check if your hosts have third-party AV software installed.<br><br>**Note:** In {{stack}} 9.0.0, this privilege is called **Endpoint Insights**. |
+| **Endpoint Exceptions** | Add and use [endpoint exceptions](/solutions/security/detect-and-alert/add-manage-exceptions.md#endpoint-rule-exceptions).<br><br>**Note:** This privilege is only available in {{serverless-short}}. In {{stack}}, it's included within the **Security** privilege. |
 | **Trusted Applications** | Access the [Trusted applications](/solutions/security/manage-elastic-defend/trusted-applications.md) page to remediate conflicts with other software, such as antivirus or endpoint security applications. |
 | **Host Isolation Exceptions** | Access the [Host isolation exceptions](/solutions/security/manage-elastic-defend/host-isolation-exceptions.md) page to add specific IP addresses that isolated hosts can still communicate with. |
 | **Blocklist** | Access the [Blocklist](/solutions/security/manage-elastic-defend/blocklist.md) page to prevent specified applications from running on hosts, extending the list of processes that {{elastic-defend}} considers malicious. |