Update docs theme to 1.8.3

[dgarcia360]

Related issue https://github.com/scylladb/sphinx-scylladb-theme/issues/1229

ScyllaDB Sphinx Theme 1.8.3 is out 🥳!

This release addresses some issues introduced in version 1.8. The key updates include:

• Dark theme settings are now preserved between projects.
• Tooltip functionality now supports glossary entries.
• Dependabot configuration was edited to allow theme-related packages updates.

You can read more about all the notable changes here (1.8.2 and 1.8.3)

[scylla-operator-bot[bot]]

Hi @dgarcia360. Thanks for your PR.

I'm waiting for a scylladb member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[dgarcia360]

cc/ @annastuchlik

[zimnx]

/ok-to-test

[scylla-operator-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dgarcia360, tnozicka, zimnx

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/scylladb/scylla-operator/blob/master/OWNERS)~~ [tnozicka,zimnx] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[rzetelskik]

/lgtm