fix for transport data url not working

[GbotemiB]

Closes # (if applicable).

Changes proposed in this Pull Request

The PR creates a fix for url not available in the prepare_transport_data_input.py script

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Newly introduced dependencies are added to envs/environment.yaml and envs/environment.docs.yaml.
• Changes in configuration options are added in all of config.default.yaml, config.tutorial.yaml, and test/config.test1.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv and line references are adjusted in doc/configuration.rst and doc/tutorial.rst.
• A note for the release notes doc/release_notes.rst is amended in the format of previous release notes, including reference to the requested PR.

[hazemakhalek]

As discussed and agreed. In case of download failure, we use an already constructed csv file.
The download has been crashing for a week now, so carry out this solution because we see this as a recurring/consistent issue.

The raw file is not initially saved in the workflow, so we proceed with the combined csv and skip several steps in the script since no one of us has the raw file. To be adapted to the raw file once the download works again.