Only do dependabot once a month

To not drive us crazy

Author: filiptronicek

.github/dependabot.yml

@@ -5,7 +5,7 @@ updates:
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
 
   - package-ecosystem: "github-actions"
     directory: "/"