fix(mongodbapi): count_documents needs a query

Author: Shanee

scripts/scheduled/metrics.py

@@ -21,10 +21,10 @@
 contributors = len(contributors)
 
 # Number of Links
-links = db.links.count_documents()
+links = db.links.count_documents({})
 
 # Number of Source sheets
-sheets = db.sheets.count_documents()
+sheets = db.sheets.count_documents({})
 
 metrics = {
     "timestamp": datetime.datetime.now().replace(hour=0, minute=0, second=0, microsecond=0),