Improve documentation

[kaklakariada]

All Submissions:

• Is the title of the Pull Request correct?
• Is the title of the corresponding issue correct?
• Have you updated the changelog?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Are you mentioning the issue which this PullRequest fixes ("Fixes...")
• Before you merge don't forget to run all tests for all Exasol version, by adding [run all tests] to the commit message
• Are the CLI usage examples up to date?

[Nicoretti]

@kaklakariada should we rebase or close this one?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud