Summary: LangChain adds startup program and agent tagline

Why It Matters: The company is shifting its brand focus toward "Reliable AI Agents" and creating a specific path to attract early-stage companies.

What Changed:

• Updated the main page title to "LangChain: Observe, Evaluate, and Deploy Reliable AI Agents."
• Added a new "LangSmith for Startups" link under the Community section.
• Added a "Responsible Disclosure Policy" link to the website footer.