docs: Fixing integrations-langwatch.md (langflow-ai#2783)

Update integrations-langwatch.md

Fixing the link to Langwatch.

Updated link from langwatch.com to langwatch.ai

(cherry picked from commit e4a8769)

docs/docs/Integrations/integrations-langwatch.md

@@ -17,7 +17,7 @@ To integrate with Langflow, just add your LangWatch API as a Langflow environmen
 
 ## Step-by-step Configuration {#6f1d56ff6063417491d100d522dfcf1a}
 
-1. Obtain your LangWatch API key from [https://app.langwatch.com/](https://app.langwatch.com/)
+1. Obtain your LangWatch API key from [https://app.langwatch.ai/](https://app.langwatch.ai/)
 2. Add the following key to Langflow .env file:
 
 ```shell