Summary: LlamaCloud offers 10k free credits

Why It Matters: This change shows LlamaIndex is trying to get more people to try LlamaCloud. They are using a free offer to attract new users.

What Changed:

• A banner promoting a webinar was removed.
• A new banner was added offering 10,000 free credits for signing up for LlamaCloud.
• Some URLs were changed from www.llamaindex.ai to llamaindex.ai.