chore: Add vendor-bin dependabot configurations

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

.github/dependabot.yml

@@ -3,17 +3,16 @@
 version: 2
 updates:
 - package-ecosystem: composer
-  directory: "/"
+  directories:
+  - /
+  - /vendor-bin/cs-fixer
+  - /vendor-bin/psalm
+  - /tests/integration
   schedule:
     interval: daily
     time: "03:00"
     timezone: Europe/Paris
   open-pull-requests-limit: 10
-- package-ecosystem: composer
-  directory: "/tests/integration"
-  schedule:
-    interval: weekly
-    day: saturday
-    time: "03:00"
-    timezone: Europe/Paris
-  open-pull-requests-limit: 10
+  labels:
+    - 3. to review
+    - dependencies