feat: edit and extend bug_report.md

[PatrykKuniczak]

* denotes required fields

Priority*

• High: This PR needs to be merged first, before other tasks.
• Medium: This PR should be merged quickly to prevent conflicts due to common changes. (default)
• Low: This PR does not affect other tasks, so it can be merged later.

Purpose of the PR*

Create more user friendly bug_report template for GH issues

Changes*

I've removed placeholders, because it was annoying to remove it.
It was more complicated to select e.g Windows from this array then type Windows instead.

How to check the feature

Try to open new issue