CI: fix unit-test job.

Author: zerai

.github/workflows/commit-stage.yaml

@@ -204,15 +204,15 @@ jobs:
             if: ${{ !matrix.generate-coverage-report }}
             run: |
                 vendor/bin/phpunit --testsuite=unit --testdox --colors=always
-            continue-on-error: ${{ matrix.generate-coverage-report }}
+            continue-on-error: ${{ matrix.experimental }}
 
           - name: Run unit tests WITH COVERAGE
             if: ${{ matrix.generate-coverage-report }}
             run: |
                 vendor/bin/phpunit --testsuite=unit --testdox --colors=always \
                 --coverage-clover ${{ vars.UNIT_TEST_CLOVER_FILENAME }} \
                 --testdox-text ${{ vars.UNIT_TEST_DOC_FILENAME }}
-            continue-on-error: ${{ matrix.generate-coverage-report }}
+            continue-on-error: ${{ matrix.experimental }}
 
           - name: Get Coverage artifact name
             if: ${{ matrix.generate-coverage-report }}