docs(readme): fix typo

stainless-app[bot] · stainless-app[bot] · commit a6c76091c66a · 2025-04-30T15:46:55.000Z
diff --git a/README.md b/README.md
@@ -118,7 +118,7 @@ rescue OpenAI::Errors::APIError => e
 end
 ```
 
-Error codes are as followed:
+Error codes are as follows:
 
 | Cause            | Error Type                 |
 | ---------------- | -------------------------- |
