Fix a typo

grktsh · grktsh · commit 6d4ee538fec3 · 2020-04-20T01:56:22.000+09:00
diff --git a/README.rst b/README.rst
@@ -20,8 +20,8 @@ Prerequisites
 
 - Environment variable ``QUEUE_LOCATION`` in which Cloud Tasks service runs
 
-Unavaiable options
-------------------
+Unavailable options
+-------------------
 
 - ``_transactional``: Transactional tasks are unavailable in Cloud Tasks
 - ``_retry_options``: Retry options for tasks are unavailable in Cloud Tasks
