fix: parsing of OPENAI_API_BASE_URLS env var

[ther0bster]

Pull Request Checklist

• Description: Briefly describe the changes in this pull request.
• Changelog: Ensure a changelog entry following the format of Keep a Changelog is added at the bottom of the PR description.
• Documentation: Have you updated relevant documentation?
• Dependencies: Are there any new dependencies? Have you updated the dependency versions in the documentation?

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Description

First, thanks for this great project!
Version v0.1.110 of open-webui introduced a feature that enables configuring multiple OpenAI API based endpoints.
Currently, these endpoints can be stored and configured with the OPENAI_API_KEYS and OPENAI_API_BASE_URLS env vars.
The env var OPENAI_API_BASE_URLS is currently not parsed correctly, because instead, the OPENAI_API_BASE_URL is parsed.
Tested by setting OPENAI_API_BASE_URLS="https://api.openai.com/v1;https://api.mistral.ai/v1".
This PR fixes the env var parsing.

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Changelog Entry

Fixed

• Fix parsing of OPENAI_API_BASE_URLS env var

[tjbck]

Good catch, LGTM Thanks!