docs(readme): fix typo

stainless-app[bot] · stainless-app[bot] · commit 550552e77892 · 2025-05-06T09:45:20.000-04:00
diff --git a/README.md b/README.md
@@ -138,7 +138,7 @@ async function main() {
 main();
 ```
 
-Error codes are as followed:
+Error codes are as follows:
 
 | Status Code | Error Type                 |
 | ----------- | -------------------------- |
