duplicated file names in rst files.

[hjn0415a]

Describe the bug Doxysphinx makes 'namespaces_namespaces' and 'files_files' in rst files. I don't understand why its name is duplicated.

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I don't think it's because of version compatibility, but I'm leaving the version information just in case.

python: 3.10.5 doxygen: 1.12.0 doxysphinx: 3.3.12 sphinx: 8.1.3