Update tutorials/Portkey-with-Groq/Readme.md

Co-authored-by: Hatice Ozen <139392640+hozen-groq@users.noreply.github.com>

tutorials/Portkey-with-Groq/Readme.md

@@ -81,7 +81,7 @@ One of Portkey's strengths is the ability to easily switch between different LLM
 ```python
 portkey = Portkey(
     api_key="YOUR_PORTKEY_API_KEY",
-    virtual_key="YOUR_OPENAI_VIRTUAL_KEY",
+    virtual_key="VIRTUAL_KEY",
 )
 ```