v2.26.0

What's Changed

• [AUTO] Increment version to 2.26.0. by @opensearch-trigger-bot in #1595
• Add missed changelog entry by @Xtansia in #1597
• [Backport 2.x] Fix Java 8 unit tests by @opensearch-trigger-bot in #1637
• [Backport 2.x] Update the maven snapshot publish endpoint and credential (#1634) by @Xtansia in #1639
• [Backport 2.x] jackson ObjectMapper: auto-detect modules (#1643) by @Xtansia in #1648
• [Backport 2.x] Specify head ref to checkout in dependabot PR workflow by @opensearch-trigger-bot in #1654
• [Backport 2.x] Update maven publishing workflow to accommodate nexus EOL by @opensearch-trigger-bot in #1659
• Backport fixes to 2.x and prepare v2.26.0 release by @Xtansia in #1670
• [Backport 2.x] Updated doc for ConnectionConfigCallback by @opensearch-trigger-bot in #1675

Full Changelog: v2.25.0...v2.26.0