Update firecrawl.mdx (langchain-ai#5224)

Author: nickscamara

docs/core_docs/docs/integrations/document_loaders/web_loaders/firecrawl.mdx

@@ -16,7 +16,7 @@ This guide shows how to scrap and crawl entire websites and load them using the
 
 ## Setup
 
-Sign up and get your free [FireCrawl API key](https://firecrawl.dev) to start. FireCrawl offers 100 free credits to get you started, and it's [open-source](https://github.com/mendableai/firecrawl) in case you want to self-host.
+Sign up and get your free [FireCrawl API key](https://firecrawl.dev) to start. FireCrawl offers 300 free credits to get you started, and it's [open-source](https://github.com/mendableai/firecrawl) in case you want to self-host.
 
 ## Usage