Update python_sdformat.py

[arjo129]

🦟 Bug fix

Fixes #<NUMBER>

Summary

It seems like we need to append the version number to sdformat.

Checklist

• [ ] Signed all commits for DCO
• [ ] Added tests
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

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[arjo129]

I think an actual example, rather than just a stub 😂

[azeey]

ha ha, okay, I'll remove this from the milestone.