Update share Copilot Chat conversations (#55180)

Co-authored-by: Jules Porter <[email protected]>

Author: jules-p

assets/images/help/copilot/chat-share-button.png

@@ -408,15 +408,18 @@ You can access {% data variables.product.prodname_copilot_short %}'s immersive v
 
 > [!NOTE] This feature is currently in {% data variables.release-phases.public_preview %} and subject to change. During the {% data variables.release-phases.public_preview %}, this feature is only available to users without enterprise or team memberships.
 
-You can share {% data variables.product.prodname_copilot_chat_short %} conversations from the immersive view ([https://github.com/copilot](https://github.com/copilot)). Shared conversations are public or private (i.e. permission-based), for example, a conversation about a private repository. If you share a private conversation, the recipient must have the necessary permissions to view the content. Shared conversations are read-only—the recipient can view the conversation but cannot interact.
+You can share {% data variables.product.prodname_copilot_chat_short %} conversations from the immersive view ([https://github.com/copilot](https://github.com/copilot)). Shared conversations are public or private (i.e. permission-based), depending on the referenced content, for example, a conversation about a private repository. If you share a private conversation, the recipient must have the necessary permissions to view the content.
+
+Once you share a conversation, the recipient can view the conversation, and continue it from the point you shared it. Any changes made to the conversation after you share it are not included in the shared link.
 
 1. In the top right of any page on {% data variables.product.github %}, click the **{% octicon "copilot" aria-hidden="true" %}** {% data variables.product.prodname_copilot %} icon next to the search bar.
 1. To view a conversation in immersive mode, click **{% octicon "screen-full" aria-hidden="true" %} Immersive**.
-1. Once you submit your first prompt, a share button will appear in the upper right corner. Click {% octicon "share" aria-label="Share" %} to open the share dialog.
+1. Once you submit your first prompt, a share button will appear in the upper right corner. Click **{% octicon "lock" aria-hidden="true" %} Share** to open the share dialog.
 
    ![Screenshot of the main search box on {% data variables.product.prodname_dotcom %}. The share button is highlighted with an orange outline.](/assets/images/help/copilot/chat-share-button.png)
 
-1. To copy the conversation link, click **{% octicon "link" aria-label="Copy conversation link" %} Create link**. The link is copied to your clipboard.
+1. To share the conversation, click **Share**. This will generate a link to the conversation.
+1. To copy the conversation link, click the **{% octicon "copy" aria-label="Copy conversation icon" %}** copy icon. The link is copied to your clipboard.
 
 ## Sharing feedback about {% data variables.product.prodname_copilot_chat_dotcom %}