Update CHANGELOG.md

Merge pull request Laravel-Backpack#5740 from Laravel-Backpack/fix-sw…

…itch-for-multiple-themes

fix switch for multiple themes

Merge pull request Laravel-Backpack#5739 from Laravel-Backpack/fix-ph…

…p8.4-dynamic-relations

fix php 8.4 dynamic relationships

Merge pull request Laravel-Backpack#5726 from Laravel-Backpack/fix-ge…

…tting-started-text

FIx the getting started text and add CalendarOperation to the premium…

Merge pull request Laravel-Backpack#5719 from Laravel-Backpack/separa…

…te-responsive-controls-from-first-column

Separate responsive controls from first column contents

Merge pull request Laravel-Backpack#5691 from Laravel-Backpack/pass-c…

…olumn-subfields-through-guessing-functions

pass column subfields through guessing functions

Merge pull request Laravel-Backpack#5680 from Laravel-Backpack/add-se…

…parator-to-select_multiple

add separator to select_multiple column

Merge pull request Laravel-Backpack#5675 from Laravel-Backpack/add-de…

…bounce-to-filters

add debounce to filters

Merge pull request Laravel-Backpack#5674 from Laravel-Backpack/add-se…

…arch-debounce-to-datatables

add searchDelay option to datatables search

Merge pull request Laravel-Backpack#5667 from Laravel-Backpack/pr/5568

Allow developer to configure the behavior of actions buttons dropdown