Fix the CHANGELOG for 1.18 and update the chart to bugfixed one

[burmanm]

What this PR does:

Which issue(s) this PR fixes: Fixes #

Checklist

• [ ] Changes manually tested
• [ ] Automated Tests added/updated
• [ ] Documentation added/updated
• [x] CHANGELOG.md updated (not required for documentation PRs)
• [x] CLA Signed: DataStax CLA

[github-actions[bot]]

No linked issues found. Please add the corresponding issues in the pull request description.
Use GitHub automation to close the issue when a PR is merged

[sonarqubecloud[bot]]

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 SonarCloud