Changed github push PR action.

.github/workflows/push-pr-to-gitlab.yaml

-name: Push the branch to the home Project at MPCDF's gitlab
+name: Push the PR to the home Project at MPCDF's gitlab
 on:
-  pull_request_review:
-    types: [submitted]
+  pull_request_target:
+    paths-ignore:
+      - '.gitlab-ci.*'
+      - '.github/**'
 jobs:
   push-to-gitlab:
-    if: github.event.review.state == 'approved'
     runs-on: ubuntu-latest
     env:
       gitlab_ref: "github-${{ github.event.pull_request.number }}-${{ github.event.pull_request.user.login }}-${{ github.event.pull_request.head.ref }}"
     steps:
       - name: Git checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: '0'
-          ref: ${{ github.event.pull_request.head.ref }}
+          ref: ${{ github.event.pull_request.head.sha }}
       - name: Git push
         run: |
-          git push "https://username:${{ secrets.GITLAB_ACCESS_TOKEN }}@gitlab.mpcdf.mpg.de/nomad-lab/nomad-FAIR.git" ${{ github.event.pull_request.head.ref }}:$gitlab_ref -f
+          git push "https://username:${{ secrets.GITLAB_ACCESS_TOKEN }}@gitlab.mpcdf.mpg.de/nomad-lab/nomad-FAIR.git" HEAD:refs/heads/$gitlab_ref -f
       - name: Create MR
         run: |
           curl -X POST -L -G \