Merge pull request #2 from PowerGridModel/dependabot/github_actions/dieghernan/cff-validator-5.1.1

Bump dieghernan/cff-validator from 5.0.1 to 5.1.1

Author: mgovers

.github/workflows/citations.yml

@@ -35,4 +35,4 @@ jobs:
       run: |
         sudo apt-get update && sudo apt-get install -y r-base
     - name: Validate CITATION.cff
-      uses: dieghernan/cff-validator@54c8e737314b948f25c0e5524a9d8ae3f39b207b # v5.0.1
+      uses: dieghernan/cff-validator@d8f85828214016ce6976e740b6e0504c0fdc4dbb # v5.1.1