Bump version to 6.9

[stevenwinship]

What this PR does / why we need it:

Which issue(s) this PR closes: #11885

• Closes Release 6.9: Bump version and toggle base.image.version #11885

[pdurbin]

Merging this (when we're ready) should get Jenkins to pass:

• bump Jenkins version from 6.8 to 6.9 gdcc/dataverse-ansible#413

[pdurbin]

Merging this (when we're ready) should get Jenkins to pass:

• bump Jenkins version from 6.8 to 6.9 gdcc/dataverse-ansible#413

The PR above has been merged. I kicked off a Jenkins run:

https://jenkins.dataverse.org/job/IQSS-Dataverse-Develop-PR/job/PR-12046/2/

[pdurbin]

The PR above has been merged. I kicked off a Jenkins run:

https://jenkins.dataverse.org/job/IQSS-Dataverse-Develop-PR/job/PR-12046/2/

Unfortunately, that run failed:

edu.harvard.iq.dataverse.api.DataversesIT.testDeleteFeaturedItemWithDvObject

edu.harvard.iq.dataverse.api.SearchIT.testTabularFiles

[pdurbin]

I kicked off another run: https://jenkins.dataverse.org/job/IQSS-Dataverse-Develop-PR/job/PR-12046/3/

[pdurbin]

I kicked off another run: https://jenkins.dataverse.org/job/IQSS-Dataverse-Develop-PR/job/PR-12046/3/

This one is passing. 🎉

[github-actions]

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ghcr.io/gdcc/dataverse:11885-bump-version-6-9

ghcr.io/gdcc/configbaker:11885-bump-version-6-9

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