chore(dependabot.yaml): update max open pull request limit

Author: vitingr

.github/dependabot.yml

@@ -12,7 +12,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-    open-pull-requests-limit: 1
+    open-pull-requests-limit: 6
     labels:
       - "dependencies"
     ignore: