Fix the typo in the licenseRule.json in qtbase:

            "ests/auto/testlib/selftests/": {
            "comment": "Exception. Those are test files",
            "file type": "test",
            "spdx": ["LicenseRef-Qt-Commercial OR GPL-3.0-only"]
            },

The fix needs to be picked to all relevant branches, also tqtc/lts-6.8.