ci: fix auto-merge-deps reusable workflow reference

The caller pointed at netresearch/skill-repo-skill/.github/workflows/auto-merge-deps.yml,
which does not exist. The real reusable workflow lives at netresearch/.github.
Every pull_request event failed to resolve the reusable workflow.

Switch the reference to the correct path and change the trigger to
pull_request_target so Dependabot/Renovate PRs get write-scoped creds.

Signed-off-by: Sebastian Mendel <sebastian.mendel@netresearch.de>

Author: CybotTM

.github/workflows/auto-merge-deps.yml

@@ -1,13 +1,13 @@
 name: Auto-merge dependency PRs
 
 on:
-  pull_request:
+  pull_request_target:
 
 permissions: {}
 
 jobs:
   auto-merge:
-    uses: netresearch/skill-repo-skill/.github/workflows/auto-merge-deps.yml@main
+    uses: netresearch/.github/.github/workflows/auto-merge-deps.yml@main
     permissions:
       contents: write
       pull-requests: write