fix: thou shall keep 'em apart

Dependabot insists on having an item per package-ecosystem.

Signed-off-by: André Jaenisch <andre.jaenisch@posteo.de>

.github/dependabot.yml

@@ -5,9 +5,12 @@
 
 version: 2
 updates:
-  - package-ecosystem:
-      - "composer"
-      - "npm"
+  - package-ecosystem: "composer"
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "npm"
     directory: "/" # Location of package manifests
     schedule:
       interval: "daily"