Fixed YAML issue in 5.x contrib OSX precommit (#166)

Author: mshabunin

.github/workflows/OCV-Contrib-PR-5.x-macOS-x86_64.yaml

@@ -347,7 +347,7 @@ jobs:
       if: ${{ always() && steps.build-opencv-contrib.outcome == 'success' }}
       run: ./bin/opencv_test_ximgproc --gtest_filter=${{ env.GTEST_FILTER_STRING }} --test_threads=${{ env.PARALLEL_JOBS }} ${{ env.EXTRA_GTEST_OPTIONS }}
       working-directory: ${{ github.workspace }}/build
-      - name: Accuracy:xobjdetect
+    - name: Accuracy:xobjdetect
       timeout-minutes: 60
       if: ${{ always() && steps.build-opencv-contrib.outcome == 'success' }}
       run: ./bin/opencv_test_xobjdetect --gtest_filter=${{ env.GTEST_FILTER_STRING }} --test_threads=${{ env.PARALLEL_JOBS }} ${{ env.EXTRA_GTEST_OPTIONS }}