Improved descriptions - Githubissues

Fixes obvious errors in the descriptions, but they still need further improvements (as said in #1)

Submitter Checklist:

[x] There is a ticket for my issue
[x] Wrote a good PR/commit description
[ ] Discussed about the issue with reviewers in Discussions, Issues or other platforms
[x] Confirmed that the PR only includes changes related to my issue
[x] Checked the PR locally: flutter build windows (Request it to reviewers if you're having problems)