elasticsearch: fix changelog entries
- change version prefix from s3 to s2 which got skipped and never got built anyway.
- add missing signature
- fix signature and date in the previous changelog entry
Bug: T353270
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
Bug: T353270