[Full Changelog](https://github.com/vector-im/element-web/compare/v1.7.12...v1.7.13-rc.1) * Upgrade to React SDK 3.8.0-rc.1 and JS SDK 9.1.0-rc.1 * Translations update from Weblate [\#15644](https://github.com/vector-im/element-web/pull/15644) * Add countly experiment to develop/nightly configs [\#15614](https://github.com/vector-im/element-web/pull/15614) * Add documentation for new UIFeature flag regarding room history settings [\#15592](https://github.com/vector-im/element-web/pull/15592) * Rename Docker repo in docs [\#15590](https://github.com/vector-im/element-web/pull/15590) * Fix Jitsi regressions with custom themes [\#15575](https://github.com/vector-im/element-web/pull/15575)