Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+
+**Please read:**
+
+By default, the debug adapter from https://github.com/microsoft/vscode-js-debug is now used for Chrome debugging in VS Code. 
+
+Please file your issue at https://github.com/microsoft/vscode-js-debug/issues
+
+This repo should only be used for high-severity issues involving the old Chrome debugger (when the `debug.javascript.usePreview` setting is disabled).
+
+-->