Update issue templates

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,17 @@
+---
+name: Question
+about: how to ask an valid question
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Which Component**
+eg. Nacos Discovery, Sentinel
+
+**Describe what problem you have encountered**
+A clear and concise description of what you want to do.
+
+**Describe what information you have read**
+eg. I have read the reference doc of Sentinel