Update sort.yml

Signed-off-by: spirillen <44526987+spirillen@users.noreply.github.com>

.github/workflows/sort.yml

@@ -22,14 +22,14 @@ jobs:
       - name: Check for changes in source folder
         id: changed_files
         run: |
-          changed_files=$(git diff --name-only HEAD HEAD~1 | grep -E '^source/')
-          echo "::set-output name=changed_files::$changed_files"
+          changed_files=$(git diff --name-only HEAD~1 HEAD | grep -E '^source/')
+          echo "changed_files=$changed_files" >> $GITHUB_ENV
       - name: Sort CSV files
-        if: ${{ steps.changed_files.outputs.changed_files }}
+        if: env.changed_files
         run: |
           python tools/sort_lists.py
       - name: Commit changes
-        if: ${{ steps.changed_files.outputs.changed_files }}
+        if: env.changed_files
         run: |
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"