Function `update_pyproject_toml` is very bulky

[svenwillger]

The function is very big and repetitive and should be constructed leaner and cleaner

[svenwillger]

Unnecessary code has been removed and to avoid a lengthy repetition of version checks I wrote an extra function that just compares the functions and replaces the metadata version number in the workflow pyproject.toml with the meta data version from the template-metadata-files "source" version pyproject.toml