Bump Ollama and System.Text.Json#248

dependabot[bot] wants to merge 1 commit intomaintryAGI/LangChain.Providers:mainfrom

dependabot/nuget/src/Abstractions/src/all-6b8c801770tryAGI/LangChain.Providers:dependabot/nuget/src/Abstractions/src/all-6b8c801770Copy head branch name to clipboard