Clarify content exclusion support in Copilot modes

Updated note on content exclusion support in various modes. The article https://github.com/github/docs/blob/main/content/copilot/how-tos/configure-content-exclusion/exclude-content-from-copilot.md contains a better note. Copying the note from that page. The current text in this article could mislead users into thinking the feature will work in editors other than VS Code.

Author: queuedecay

content/copilot/concepts/context/content-exclusion.md

@@ -48,7 +48,7 @@ Content exclusions also apply to {% data variables.copilot.copilot_code-review_s
 
 > [!NOTE]
 > * Content exclusion is in {% data variables.release-phases.public_preview %} on the {% data variables.product.github %} website and in {% data variables.product.prodname_mobile %} and is subject to change.
-> * Content exclusion is currently not supported in Edit and Agent modes of {% data variables.copilot.copilot_chat_short %} in {% data variables.product.prodname_vscode %}.
+> * {% data variables.copilot.copilot_cli %}, {% data variables.copilot.copilot_coding_agent %}, and Agent mode in {% data variables.copilot.copilot_chat_short %} in IDEs, do not support content exclusion. For more information, see [AUTOTITLE](/copilot/concepts/agents/coding-agent/about-coding-agent) and [AUTOTITLE](/copilot/how-tos/chat-with-copilot/chat-in-ide).
 
 ### Limitations of content exclusion