Well, to change the button text you have to do some code customization. ‘featured-main-hook.php’ file inside ‘inc\hooks\featured-slider’ is the one where you will have to customize at line 114.
Note: Child theme is recommended for code customization.
https://codex.wordpress.org/Child_Themes#How_to_Create_a_Child_Theme
Or you can also hire a customizer for this to create a professional child theme of Bizlight.
Hope this would help your issue.