validate yaml syntax

Signed-off-by: Srikanth Ramakrishna <srikanth.ramakrishna@intel.com>

Author: sramakintel

.github/workflows/apptainer-ci.yaml

@@ -53,9 +53,9 @@ jobs:
               fi
             done
           done
-        # Convert the array to a JSON array
-        DOCKER_COMPOSE_PATHS_JSON=$(printf '%s\n' "${DOCKER_COMPOSE_PATHS[@]}" | jq -R '.' | jq -sc 'unique_by(.)')
-        echo "FOLDERS=$DOCKER_COMPOSE_PATHS_JSON" >> $GITHUB_OUTPUT
+          # Convert the array to a JSON array
+          DOCKER_COMPOSE_PATHS_JSON=$(printf '%s\n' "${DOCKER_COMPOSE_PATHS[@]}" | jq -R '.' | jq -sc 'unique_by(.)')
+          echo "FOLDERS=$DOCKER_COMPOSE_PATHS_JSON" >> $GITHUB_OUTPUT
   setup-build:
     needs: group-diff
     if: needs.group-diff.outputs.groups != '[""]'
@@ -66,17 +66,17 @@ jobs:
       fail-fast: false
     steps:
     - name: Install Apptainer
-      uses: actions/checkout@v4
-      uses: eWaterCycle/setup-apptainer@v2.0.0
+    - uses: actions/checkout@v4
+    - uses: eWaterCycle/setup-apptainer@v2.0.0
       with:
           apptainer-version: 1.3.3
     - name: Apptainer login to registry
-        env:
-          APPTAINER_DOCKER_USERNAME: ${{ secrets.REGISTRY_USER }}
-          APPTAINER_DOCKER_PASSWORD: ${{ secrets.REGISTRY_TOKEN }}
-        run: apptainer registry login  -u ${{ secrets.REGISTRY_USER }} -p ${{ secrets.REGISTRY_TOKEN }} docker://${{ secrets.REGISTRY }}
-      uses: intel/ai-containers/apptainer@sramakr1/apptainer_python
-        with:
-          registry: oras://${{ secrets.REGISTRY }}
-          repo: ${{ secrets.REPO }}-apptainer
-          group_dir: ${{ matrix.group }}
+      env:
+        APPTAINER_DOCKER_USERNAME: ${{ secrets.REGISTRY_USER }}
+        APPTAINER_DOCKER_PASSWORD: ${{ secrets.REGISTRY_TOKEN }}
+      run: apptainer registry login  -u ${{ secrets.REGISTRY_USER }} -p ${{ secrets.REGISTRY_TOKEN }} docker://${{ secrets.REGISTRY }}
+    - uses: intel/ai-containers/apptainer@sramakr1/apptainer_python
+      with:
+        registry: oras://${{ secrets.REGISTRY }}
+        repo: ${{ secrets.REPO }}-apptainer
+        group_dir: ${{ matrix.group }}