Add to exporter description that csv file get overwritten

[neubs-bsi]

The behaviour, that the csv file gets overwritten in the exporter run should it already exist is the desired one, though it should be specifically stated in the documentation as to not confuse the user.

Please provide a summary of your changes here.

• Which issue is this pull request belonging to? (Refer to issue here)
• How is it solving the issue?
• Did you add or update any new dependencies that are required for your change?

Request Reviewer

You can add desired reviewers here with an @mention.

@oheger-bosch

Type of Change

Mention one of the following:
bug fix | new feature | improvements | documentation update | CI | Other

Type of change: documentation update

How Has This Been Tested?

If you have added any changes that require additional tests, or changes in tests, you should implement them and describe them here.
All test that passed before your contribution should pass after it as well. Site test still passes.

Checklist

Must:

• [ ] All related issues are referenced in commit messages -> no issue

Optional: (delete if not applicable)

• [x] I have updated the documentation accordingly to my changes

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
No Duplication information

The version of Java (1.8.0_265) you have used to run this analysis is deprecated and we will stop accepting it from October 2020. Please update to at least Java 11. Read more here