llm 0.37.2

llm 0.37.2 fixes a security issue reported by Daniel de Araujo in GHSA-v9h7-jj4g-f862 and GHSA-r639-rr7r-x72w. The extra-openai-models.yaml mechanism, now managed by the new-in-0.37 `llm openai endpoint add` command, could accidentally send your configured OpenAI API key to another provider if the key named by api_key_name had never been stored, or if a `responses: true` model was run with `-o chat_completions 1`.