In our gallery padding = 0
You may want to change the indentation in the css of your theme?
Before making any upgrades, make the backup files of component and please do full export.
At first please check upgrade/update process at the test website!
If you have custom changes of component, you can lose your changes.
Please, in that case do not make update.
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padding: 20px 30px;
Perhaps the change in this place exactly what you want.