fix: update ask question instruction to better handle defaults (microsoft#3320)

Author: karthiknadig

package.json

@@ -1163,7 +1163,7 @@
 				"toolReferenceName": "askQuestions",
 				"displayName": "%copilot.tools.askQuestions.name%",
 				"userDescription": "%copilot.tools.askQuestions.description%",
-				"modelDescription": "Ask the user questions to clarify intent, validate assumptions, or choose between implementation approaches. Prefer proposing a sensible default so users can confirm quickly.\n\nOnly use this tool when the user's answer provides information you cannot determine or reasonably assume yourself. This tool is for gathering information, not for reporting status or problems. If a question has an obvious best answer, take that action instead of asking.\n\nWhen to use:\n- Clarify ambiguous requirements before proceeding\n- Get user preferences on implementation choices\n- Confirm decisions that meaningfully affect outcome\n\nWhen NOT to use:\n- The answer is determinable from code or context\n- Asking for permission to continue or abort\n- Confirming something you can reasonably decide yourself\n- Reporting a problem (instead, attempt to resolve it)\n\nQuestion guidelines:\n- Batch related questions into a single call (max 4 questions, 2-6 options each; omit options for free text input)\n- Provide brief context explaining what is being decided and why\n- Mark one option as `recommended` with a short justification\n- Keep options mutually exclusive for single-select; use `multiSelect: true` only when choices are additive and phrase the question accordingly\n\nAfter receiving answers:\n- Incorporate decisions and continue without re-asking unless requirements change\n\nAn \"Other\" option is automatically shown to users—do not add your own.",
+				"modelDescription": "Ask the user questions to clarify intent, validate assumptions, or choose between implementation approaches. Prefer proposing a sensible default so users can confirm quickly.\n\nOnly use this tool when the user's answer provides information you cannot determine or reasonably assume yourself. This tool is for gathering information, not for reporting status or problems. If a question has an obvious best answer, take that action instead of asking.\n\nWhen to use:\n- Clarify ambiguous requirements before proceeding\n- Get user preferences on implementation choices\n- Confirm decisions that meaningfully affect outcome\n\nWhen NOT to use:\n- The answer is determinable from code or context\n- Asking for permission to continue or abort\n- Confirming something you can reasonably decide yourself\n- Reporting a problem (instead, attempt to resolve it)\n\nQuestion guidelines:\n- NEVER use `recommended` for quizzes or polls. Recommended options are PRE-SELECTED and visible to users, which would reveal answers\n- Batch related questions into a single call (max 4 questions, 2-6 options each; omit options for free text input)\n- Provide brief context explaining what is being decided and why\n- Only mark an option as `recommended` to suggest YOUR preferred implementation choice\n- Keep options mutually exclusive for single-select; use `multiSelect: true` only when choices are additive and phrase the question accordingly\n\nAfter receiving answers:\n- Incorporate decisions and continue without re-asking unless requirements change\n\nAn \"Other\" option is automatically shown to users—do not add your own.",
 				"icon": "$(question)",
 				"when": "config.github.copilot.chat.askQuestions.enabled",
 				"inputSchema": {