Merge pull request #14343 from garysweaver/master

minor fix to 4.1 rel notes for begin_transaction joinable option

guides/source/4_1_release_notes.md

@@ -388,7 +388,7 @@ for detailed changes.
 * Removed deprecated `scope` use without passing a callable object.
 
 * Removed deprecated `transaction_joinable=` in favor of `begin_transaction`
-  with `d:joinable` option.
+  with a `:joinable` option.
 
 * Removed deprecated `decrement_open_transactions`.