update bug report template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,5 +1,5 @@
 ---
-name: Bug report
+name: Bug Report
 about: Create a bug report
 title: ''
 labels: bug
@@ -7,17 +7,29 @@ assignees: ''
 
 ---
 
-**Describe the bug**
+## OS & Version:
+e.g: Windows 11, Gupax v1.3.3
+
+## Bug
 What is the bug?
 
-**To Reproduce**
+## Steps
 Steps to reproduce the behavior:
 1. Go to '...'
 2. Click on '....'
 3. See error
 
-**Screenshots**
+## Screenshots
 If possible, add screenshots to help explain the bug.
 
-**OS & Version:**
-e.g: Windows 11, Gupax v1.2.1
+## Crash report
+If Gupax is crashing, you may have a file here:
+
+- Windows: `C:\Users\YOUR_USER_NAME\AppData\Roaming\Gupax\crash.txt`
+- macOS: `/Users/YOUR_USER_NAME/Library/Application Support/Gupax/crash.txt`
+- Linux: `/home/YOUR_USER_NAME/.local/share/gupax/crash.txt`
+
+If you do, please upload or copy-paste `crash.txt` here:
+```
+paste inside here.
+```