llm-llama-server: fix meta.description (#423105)

  passthru.tests = llm.mkPluginTest llm-llama-server;

  meta = {

    description = "LLM plugin providing access to Mistral models using the Mistral API";

    description = "LLM plugin for interacting with llama-server models";

    homepage = "https://github.com/simonw/llm-llama-server";

    changelog = "https://github.com/simonw/llm-llama-server/releases/tag/${version}/CHANGELOG.md";

    license = lib.licenses.asl20;