Need to edit a sprint.png in the Spirit Theme

Hello, I just finished switching over my multisite to https and I followed the instructions from this thread( very helpful) https://wordpress.org/support/topic/steps-for-changing-wordpress-multisite-installation-ssl-secuire-http-to-https

Everything went well except I received two errors from https://www.whynopadlock.com

and the errors were:Insecure URL: http://www.idesignasite.com/wp-content/themes/uf-spirit/ui/sprite.png
Found in: https://idesignasite.com/

Insecure URL: http://www.idesignasite.com/wp-content/themes/uf-spirit/ui/sprite.svg
Found in: https://idesignasite.com/

I went into the spirit/ui file but I'm not sure how to edit it so that the url can be updated with the https in stead of http://www (I recently got rid of www too) need to get that part edited too.

Thanks