fix: set outputs

Author: robaone

action.yml

@@ -63,4 +63,7 @@ runs:
         echo "$matrixStringifiedObject"
         echo "matrix=$matrixStringifiedObject" >> $GITHUB_OUTPUT
       env:
-        PROJECT_ROOT: ${{ inputs.project-root }}
+        PROJECT_ROOT: ${{ inputs.project-root }}
+    outputs:
+      matrix: ${{ steps.setmatrix.outputs.matrix }}
+      files: ${{ steps.files.outputs.all_changed_files }}