[ci skip] point to zenodo instead of sourceforge for OP mono download

Author: evbauer

star/defaults/controls.defaults

@@ -7409,10 +7409,10 @@
    ! _________________
 
       ! The ``OP_mono`` opacities use data and code from the OP website
-      ! as modified by Haili Hu.  Since the tar.gz file is large (656 MB),
+      ! as modified by Haili Hu.  Since the tar.xz file is large (462 MB),
       ! it is not included in the standard mesa download.
 
-      ! You can get ``OP4STARS_1.3.tar.xz`` from http://sourceforge.net/projects/mesa/files
+      ! You can get ``OP4STARS_1.3.tar.xz`` from https://zenodo.org/records/4390522
 
       ! Put it any place you want on your disk.