chore(version): add 2.9.0 to upgrade matrix

[prateekpandey14]

Signed-off-by: prateekpandey14 prateek.pandey@mayadata.io

What this PR does?: Add support for 2.9.0 version upgrade

Checklist:

• [ ] Fixes #
• [x] PR Title follows the convention of <type>(<scope>): <subject>
• [ ] Has the change log section been updated?
• [ ] Commit has unit tests
• [ ] Commit has integration tests
• [ ] (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• [ ] (Optional) If documentation changes are required, which issue on https://github.com/openebs/openebs-docs is used to track them:

[shubham14bajpai]

This is not required as it has been already taken care of in https://github.com/openebs/maya/pull/1797/files