Update issue templates (#140)

.github/ISSUE_TEMPLATE/bug-.md

+---
+name: 'Bug:'
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+  Please provide a clear and concise description of what the bug is. Include
+  screenshots if needed. Please test using the latest version of the relevant
+  Dify packages to make sure your issue has not already been fixed.
+-->
+
+Dify version: Cloud | Self Host
+
+## Steps To Reproduce
+<!--
+  Your bug will get fixed much faster if we can run your code and it doesn't
+  have dependencies other than Dify. Issues without reproduction steps or
+  code examples may be immediately closed as not actionable.
+-->
+
+1.
+2.
+
+
+## The current behavior
+
+
+## The expected behavior