Run Biolink mapping update weekly instead of monthly

Author: CaseyTa

cohd/scheduled_tasks.py

@@ -15,10 +15,9 @@ def task_build_cache():
 scheduler.add_job(func=BiolinkConceptMapper.prefetch_mappings, trigger='cron', hour=6)
 
 # Schedule a task to build the cache every first Saturday of the month 
-# Perform in each ITRB environment and on the prod instance on TReK server 
 deployment_env = app.config.get('DEPLOYMENT_ENV', 'dev').lower()
 if deployment_env in ('itrb-ci', 'itrb-test', 'itrb-prod', 'prod'):    
-    scheduler.add_job(func=task_build_cache, trigger='cron', day='1st sat', hour=0)    
+    scheduler.add_job(func=task_build_cache, trigger='cron', day_of_week='sat', hour=0)    
     logging.info(f'Background task scheduled to build Biolink mappings (env: {deployment_env})')
 else:
     logging.info(f'Background task NOT scheduled to build Biolink mappings (env: {deployment_env})')