chore: simplify matrix example workflow (#1719)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

.github/workflows/matrix-test.yml

@@ -8,10 +8,10 @@ on:
 
 jobs:
   changed-files:
-    name: Get changes
+    name: Get changed files
     runs-on: ubuntu-latest
     outputs:
-      matrix: ${{ steps.set-matrix.outputs.matrix }}
+      matrix: ${{ steps.changed-files.outputs.all_changed_files }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -23,17 +23,17 @@ jobs:
         with:
           json: true
           quotepath: false
+          escape_json: false
       - name: List all changed files
         run: echo '${{ steps.changed-files.outputs.all_changed_files }}'
-      - id: set-matrix
-        run: echo "matrix={\"files\":${{ steps.changed-files.outputs.all_changed_files }}}" >> "$GITHUB_OUTPUT"
 
   matrix-job:
     name: Run Matrix Job
     runs-on: ubuntu-latest
     needs: [changed-files]
     strategy:
-      matrix: ${{ fromJSON(needs.changed-files.outputs.matrix) }}
+      matrix: 
+        files: ${{ fromJSON(needs.changed-files.outputs.matrix) }}
       max-parallel: 4
       fail-fast: false
     steps: