Fixed inconsistencies in bug report template, improved examples

.github/ISSUE_TEMPLATE/bug_report.md

@@ -28,11 +28,11 @@ If applicable, add screenshots to help explain your problem.
 
 **Environment (please complete the following information):**
  - OS: [e.g. Windows 10/raspian]
- - Python version [e.g. python2.7]
- - Calibre-Web version [e.g. 0.6.5 or master@16.02.20, 19:55 ]:
- - Docker container [ None/Technosoft2000/Linuxuser]:
- - Special Hardware [e.g. Rasperry Pi Zero]
- - Browser [e.g. chrome, safari]
+ - Python version: [e.g. python2.7]
+ - Calibre-Web version: [e.g. 0.6.8 or 087c4c59 (git rev-parse --short HEAD)]:
+ - Docker container: [None/Technosoft2000/Linuxuser]:
+ - Special Hardware: [e.g. Rasperry Pi Zero]
+ - Browser: [e.g. Chrome 83.0.4103.97, Safari 13.3.7, Firefox 68.0.1 ESR]
 
 **Additional context**
 Add any other context about the problem here. [e.g. access via reverse proxy]