Bump cvmfs-contrib/github-action-cvmfs from 4 to 5

Bumps [cvmfs-contrib/github-action-cvmfs](https://github.com/cvmfs-contrib/github-action-cvmfs) from 4 to 5.
- [Release notes](https://github.com/cvmfs-contrib/github-action-cvmfs/releases)
- [Commits](cvmfs-contrib/github-action-cvmfs@v4...v5)

---
updated-dependencies:
- dependency-name: cvmfs-contrib/github-action-cvmfs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/cvmfs.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Generate root file
         run: |
           julia --code-coverage --project ./test/RNTupleWriting/output_sample.jl test1.root
-      - uses: cvmfs-contrib/github-action-cvmfs@v4
+      - uses: cvmfs-contrib/github-action-cvmfs@v5
       - name: Read root file in C++
         run: |
           source /cvmfs/sft.cern.ch/lcg/views/dev3/latest/x86_64-ubuntu2204-gcc11-opt/setup.sh