Git Bug Report template; better user guidance

.github/ISSUE_TEMPLATE/bug_report.md

@@ -27,5 +27,12 @@ If applicable, add screenshots to help explain your problem.
 - YoutubeDL-Material version
 - Docker tag: <tag> (optional)
 
+Ideally you'd copy the info as presented on the "About" dialogue
+in YoutubeDL-Material.
+(for that, click on the three dots on the top right and then
+check "installation details". On later versions of YoutubeDL-
+Material you will find pretty much all the crucial information
+here that we need in most cases!)
+
 **Additional context**
 Add any other context about the problem here. For example, a YouTube link.