fixes timeline ref

Author: benironside

docs/serverless/AI-for-security/attack-discovery.asciidoc

@@ -91,7 +91,7 @@ There are several ways you can incorporate discoveries into your {elastic-sec} w
 * Click an entity's name to open the user or host details flyout and view more details that may be relevant to your investigation.
 * Hover over an entity's name to either add the entity to Timeline (image:images/icons/timelineWithArrow.svg[Add to timeline icon,17,18]) or copy its field name and value to the clipboard (image:images/icons/copyClipboard.svg[Copy to clipboard icon,17,18]). 
 * Click **Take action**, then select **Add to new case** or **Add to existing case** to add a discovery to a <<security-cases-overview, case>>. This makes it easy to share the information with your team and other stakeholders.
-* Click **Investigate in timeline** to explore the discovery in <<timelines-ui, Timeline>>.
+* Click **Investigate in timeline** to explore the discovery in <<security-timelines-ui, Timeline>>.
 * Click **View in AI Assistant** to attach the discovery to a conversation with AI Assistant. You can then ask follow-up questions about the discovery or associated alerts. 
 
 image::images/add-discovery-to-assistant.gif[Attack Discovery view in AI Assistant]