try just using ss3 since it should be in the path

Author: e-perl-NOAA

.github/workflows/update-ss3-models.yml

@@ -79,9 +79,9 @@ jobs:
             purrr::map(
               .x = file.path(new_mod_dir_name, list.files(new_mod_dir_name)),
               .f = r4ss::run,
-              exe = "/usr/local/bin/ss3", 
+              exe = "ss3", 
               verbose = TRUE)
-
+                      
           new_mod_runs_folder <- file.path(new_mod_dir_name)
           new_mod_path_list <- list.dirs(new_mod_runs_folder, recursive = FALSE,
                                         full.names = TRUE)