fix: typo

Author: Saul-BT

.env.example

@@ -21,7 +21,7 @@ OPENAI_BASE_URL="https://api.openai.com/v1"
 # Example Google mapping:
 # PREFERRED_PROVIDER="google"
 # BIG_MODEL="gemini-2.5-pro"
-# SMALL_MODEL="gemini-2.05-flash"
+# SMALL_MODEL="gemini-2.5-flash"
 
 # Example "just an Anthropic proxy" mode:
 # PREFERRED_PROVIDER="anthropic"