ci(dependabot): update configuration for PIP packages upgrade

.github/dependabot.yml

@@ -5,8 +5,7 @@ updates:
   directory: "/"
   schedule:
     interval: daily
-    time: "04:00"
-  open-pull-requests-limit: 10
+  open-pull-requests-limit: 5
   target-branch: master
   reviewers:
     - Deuchnord