enhance set output

.github/workflows/workflow.yml

@@ -22,9 +22,18 @@ jobs:
         channel: [stable, beta, master]
     steps:
     - uses: actions/checkout@v3
-    - uses: ./
+    - id: flutter-action
+      uses: ./
       with:
         channel: ${{ matrix.channel }}
+    - name: Echo outputs
+      run: |
+        echo cache-path=${{ steps.flutter-action.outputs.cache-path }}
+        echo cache-key=${{ steps.flutter-action.outputs.cache-key }}
+        echo channel=${{ steps.flutter-action.outputs.channel }}
+        echo version=${{ steps.flutter-action.outputs.version }}
+        echo architecture=${{ steps.flutter-action.outputs.architecture }}
+      shell: bash
     - run: dart --version
       shell: bash
     - run: flutter --version