Workflow fails if `categories` property is missing in the properties file

[SableRaf]

Description:

The workflow currently fails if the categories property is missing from the properties file provided as input. This results in a KeyError when attempting to access props['categories'].

Error log excerpt:

File "/home/runner/work/processing-contributions/processing-contributions/scripts/add_new_contribution_to_yaml.py", line 18, in <module>
    if props['categories']:
       ~~~~~^^^^^^^^^^^^^^
KeyError: 'categories'
Error: Process completed with exit code 1.

Steps to Reproduce:

1. Run the workflow with a properties file that does not include the categories property (for example: https://github.com/KrabCode/LazyGui/releases/download/latest/LazyGui.txt)
2. Observe the workflow failing with the above error.

Proposed Solution:

Add a check for the existence of the key and provide a default value (None) if it is not present:

if 'categories' in props and props['categories']:
    props['categories'] = sorted(props['categories'].replace('"', '').split(','))
    props['categories'] = [category.strip() for category in props['categories']]
else:
    props['categories'] = None

Additional Notes

I'll make a PR shortly that will address this issue.

[github-actions]

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