Less frequent Dependabot updates (#1117)

Author: egeakman

.github/dependabot.yml

@@ -3,7 +3,7 @@ updates:
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     groups:
       react-dependencies:
         patterns:
@@ -14,4 +14,4 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"