[MAINTENANCE] Missing or outdated SECURITY.md file in ansys/pydynamicreporting

Please add the SECURITY.md file to the repository. The file might either be missing or is an outdated version of the expected file.

See [here](https://github.com/ansys-internal/pyansys-maintenance-automation/blob/main/scripts/file_references) an up-to-date reference to a properly formatted file.

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