[Theme Horse Support Team]

Hi woodlandsp,
This url is enqueue from the theme folder -> library -> functions -> functions.php
you can simply modify the http:// to https:// on line no 68
wp_register_style( 'attitude_google_font', 'http://fonts.googleapis.com/css?family='.$attitude_google_font_load );

but We recommended not to change the code because if you change the code then while updating to our new version all your customisation code will be lost. So better make child theme and first unhook the functions and the edit the code.

http://codex.wordpress.org/Child_Themes

Thank you!