DOC: fix default value for config.REPOSITORIES

[hagenw]

Ensures the correct value is shown for audb.config.REPOSITORIES in the documentation.
This is ensured by reading the default config file inside docs/conf.py and extract the value for REPOSITORIES from there.

Summary by Sourcery

Documentation:

• Correct the default value for audb.config.REPOSITORIES in the documentation by dynamically loading it from the default configuration file.

[sourcery-ai]

Reviewer's Guide by Sourcery

The PR updates the documentation to correctly display the default value for audb.config.REPOSITORIES. Instead of hardcoding the repository configuration in the documentation, it now reads the actual default values from the global configuration file.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated repository configuration in documentation build process	Added code to load repository configuration from global config file Replaced hardcoded repository with dynamic configuration from loaded file Changed list comprehension to create Repository objects from config data	docs/conf.py
Updated example values in Repository documentation	Updated example repository name from 'data-local' to 'audb-public' Changed example backend from 'artifactory' to 's3' Updated example host URL to use AWS S3 endpoint instead of Artifactory	audb/core/config.py

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[sourcery-ai]

Hey @hagenw - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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