Fix: right-click menu option is 'Chat' not 'Ask Copilot'

The context menu item was renamed. 'Ask Copilot' is now the text box
label inside the inline chat panel, not the menu option itself.
Also adds a tip about promoting inline chat to the Chat panel via
Copilot Actions > Add to Chat.

Co-authored-by: Copilot <[email protected]>

Author: GrantMeStrength

hub/apps/how-tos/github-copilot-winui-vs.md

@@ -55,9 +55,12 @@ To reference a specific file in Chat, type `#` and select the file from the pick
 
 ### Ask Copilot for inline suggestions
 
-Right-click in the code editor and select `Ask Copilot`. A prompt window will open where you can chat inline with Copilot to get a list of suggestions based on the current cursor position and your prompt:
+Right-click in the code editor and select **Chat** to open an inline chat window at your cursor position. Type your question and press **Enter**:
 
-:::image type="content" source="images/github-copilot-winui-vs/2-generate-multiple-suggestions.png" alt-text="Screenshot that shows the inline prompting capabilities of GitHub Copilot.":::
+:::image type="content" source="images/github-copilot-winui-vs/2-generate-multiple-suggestions.png" alt-text="Screenshot that shows the inline chat capabilities of GitHub Copilot.":::
+
+> [!TIP]
+> You can promote an inline chat thread to the full Chat panel at any time by selecting **Copilot Actions** > **Add to Chat**. This preserves the conversation context so you can continue in the panel.
 
 ### Prompt Copilot with plain-language comments