Fix/fix typo in readme

[metters]

1. I fixed some minor typos in the README-file, especially Vershion, which should be Version.
2. My IntelliJ IDEA also added two *.iml files which i added to the gitignore file. I can also remove that if you mind that change.

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira // --> No issue exists
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue // It is the README, no tests

[metters]

TBH, I was not sure about the TODO: Link to relevant pull requests, esp. upstream and downstream changes.
This is the PR and the changes are here. If there is something missing please let me know, I will provide it.

The changes are so minor, however, I doubt it is necessary.
Have a nice weekend.