ci: update dependabot settings

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Author: caarlos0

.github/dependabot.yml

@@ -3,10 +3,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
-      day: "monday"
-      time: "05:00"
-      timezone: "America/New_York"
+      interval: monthly
     labels:
       - "dependencies"
     commit-message:
@@ -19,10 +16,7 @@ updates:
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "weekly"
-      day: "monday"
-      time: "05:00"
-      timezone: "America/New_York"
+      interval: monthly
     allow:
       - dependency-type: "production"
     labels: