update dependabot schedule to run weekly on mondays for npm (#486)

Author: cemms1

.github/dependabot.yaml

@@ -4,6 +4,7 @@ updates:
     directory: '/'
     schedule:
       interval: 'weekly'
+      day: 'monday'
       time: '09:00'
     groups:
       rollup:
@@ -58,4 +59,4 @@ updates:
   - package-ecosystem: 'github-actions'
     directory: '/'
     schedule:
-      interval: 'daily'
+      interval: 'weekly'