docs: fix typo in #3171

.env.template

@@ -17,6 +17,11 @@ BASE_URL=
 # Default: Empty
 OPENAI_ORG_ID=
 
+# (optional)
+# Default: Empty
+# If you do not want users to use GPT-4, set this value to 1.
+DISABLE_GPT4=
+
 # (optional)
 # Default: Empty
 # If you do not want users to input their own API key, set this value to 1.