Update and rename bug.yml to bug.md

Author: pavelfeldman

.github/ISSUE_TEMPLATE/bug.md

@@ -0,0 +1,28 @@
+---
+name: Bug Report
+about: Something doesn't work like it should? Tell us!
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Context:**
+- Playwright Version: [what Playwright version do you use?]
+- Operating System: [e.g. Windows, Linux or Mac]
+- Python version: [e.g. 3.7, 3.9]
+- Browser: [e.g. All, Chromium, Firefox, WebKit]
+- Extra: [any specific details about your environment]
+
+<!-- CLI to auto-capture this info -->
+<!-- npx envinfo --preset playwright --markdown -->
+
+**Code Snippet**
+
+Help us help you! Put down a short code snippet that illustrates your bug and
+that we can run and debug locally.
+```
+
+**Describe the bug**
+
+Add any other details about the problem here.