update package-ecosystem

Author: leoc-22

.github/dependabot.yml

@@ -1,7 +1,7 @@
 version: 2
 updates:
   # Web frontend dependencies
-  - package-ecosystem: "npm"
+  - package-ecosystem: "bun"
     directory: "/web"
     schedule:
       interval: "weekly"
@@ -13,7 +13,7 @@ updates:
         dependency-type: "production"
 
   # Worker dependencies
-  - package-ecosystem: "npm"
+  - package-ecosystem: "bun"
     directory: "/worker"
     schedule:
       interval: "weekly"