Use EESSI action, improve names

.github/workflows/test_compare_stacks.yml

@@ -1,5 +1,5 @@
 # documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
-name: Check for discrepancies between software stacks in software.eessi.io
+name: Check for discrepencies between software stacks in software.eessi.io
 on:
   push:
     branches: [ "*-software.eessi.io" ]
@@ -14,7 +14,7 @@ env:
     x86_64/amd/zen3:
       - nvidia/cc80
 jobs:
-  check_missing:
+  compare_stacks:
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
@@ -34,13 +34,9 @@ jobs:
           uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
         - name: Mount EESSI CernVM-FS pilot repository
-          uses: cvmfs-contrib/github-action-cvmfs@55899ca74cf78ab874bdf47f5a804e47c198743c # v4.0
-          with:
-              cvmfs_config_package: https://github.com/EESSI/filesystem-layer/releases/download/latest/cvmfs-config-eessi_latest_all.deb
-              cvmfs_http_proxy: DIRECT
-              cvmfs_repositories: software.eessi.io
+          uses: eessi/github-action-eessi@v3
 
-        - name: Check
+        - name: Compare stacks
           run: |
               export EESSI_PREFIX=/cvmfs/software.eessi.io/versions/${{matrix.EESSI_VERSION}}
               export EESSI_OS_TYPE=linux