chore: Change dependabot PR interval to monthly (#977)

to reduce the number of PRs it creates

Author: GeckoEidechse

Diff for: .github/dependabot.yml

@@ -6,22 +6,22 @@ updates:
   - package-ecosystem: 'npm'
     directory: '/'
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     commit-message:
       prefix: "chore: "
 
   # NPM packages
   - package-ecosystem: 'npm'
     directory: '/src-vue'
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     commit-message:
       prefix: "chore: "
 
   # Rust crates
   - package-ecosystem: 'cargo'
     directory: '/src-tauri'
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     commit-message:
       prefix: "chore: "