Fix typo (#12495)

diff --git a/doc/build/errors.rst b/doc/build/errors.rst
index e3f6cb90322af811e8c654521151c06ce6461d13..10ca4cf252f7b69470136b2dfdce8c4f2fef81a4 100644 (file)
--- a/doc/build/errors.rst
+++ b/doc/build/errors.rst
@@ -136,7 +136,7 @@ What causes an application to use up all the connections that it has available?
   upon to release resources in a timely manner.
 
   A common reason this can occur is that the application uses ORM sessions and
-  does not call :meth:`.Session.close` upon them one the work involving that
+  does not call :meth:`.Session.close` upon them once the work involving that
   session is complete. Solution is to make sure ORM sessions if using the ORM,
   or engine-bound :class:`_engine.Connection` objects if using Core, are explicitly
   closed at the end of the work being done, either via the appropriate