Update semantic release workflow

[julianhoever]

Currently we are using python-semantic-release==7.34.6 for increasing the versions and publishing to PyPi and GitHub.

In version 8 they made breaking changes to this package and don't support publishing to PyPi and GitHub anymore. For now we are still using version 7.34.6 which is the last version before 8.0.0. If we want to use this package in the future, we should consider updating the package to version 8.

A procedure for migrating from version 7 to version 8 is described here. This procedure leads to a problem that we had also in the past: The GitHub action of the python-semantic-release package don't uses the python version specified by the actions/setup-python@v4 action.

If we want to use the python-semantic-release package in the future we should find a solution for this. Otherwise it will be deprecated at some point.