How to update my Child Theme
If you updated Theme but WordPress still says your Theme is not updated (you use a child theme)
You will need to change the Child Theme version to be the same as the parent
You can do this in three different ways:
Way 1:
If you not customised the child theme style.css
You can replace it with the new one from the child folder in the new theme update package
Way 2:
Go to Appearance > Theme Editor
Then select the style.css file of the child theme and change the version
Way 3:
Edit the child theme style.css by FTP
Connect by FTP to your server, then go to wp-content/themes/your-child-theme/
Move the style.css to your desktop and edit it
Change the version and upload it again to server