fix(dependabot): do not list each workspace item

.github/dependabot.yml

@@ -10,28 +10,15 @@ updates:
   schedule:
     interval: daily
   open-pull-requests-limit: 100
+
+# Add only the root, not each workspace item
+# https://github.com/dependabot/dependabot-core/issues/4993#issuecomment-1289133027
 - package-ecosystem: npm
   directory: "/"
   schedule:
     interval: daily
   open-pull-requests-limit: 100
-- package-ecosystem: npm
+  groups:
-  directory: "/packages/backend"
+    swc:
-  schedule:
+      patterns:
-    interval: daily
+        - "@swc/*"
-  open-pull-requests-limit: 100
-- package-ecosystem: npm
-  directory: "/packages/frontend"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 100
-- package-ecosystem: npm
-  directory: "/packages/sw"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 100
-- package-ecosystem: npm
-  directory: "/packages/misskey-js"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 100