Change dependabot interval from daily to monthly

Author: mszostok

.github/dependabot.yml

@@ -9,22 +9,22 @@ updates:
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"
 
   # Maintain dependencies for build tools
   - package-ecosystem: "gomod"
     directory: "/tools"
     schedule:
-      interval: "daily"
+      interval: "monthly"
 
   # Maintain dependencies for GitHub Actions
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"
 
   # Maintain dependencies for Dockerfile
   - package-ecosystem: "docker"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"