Update docs/configuring.md

Co-authored-by: Sigurd Spieckermann <[email protected]>

docs/configuring.md

@@ -1158,7 +1158,7 @@ Migrations are like [tasks][tasks], but each item can have additional keys:
     is specified the migration will run on every update.
 -   **when** (optional): Specifies a condition that needs to hold for the task to run.
 -   **working_directory** (optional): Specifies the directory in which the command
-    should be run. Defaults to the destination directory.
+    will be run. Defaults to the destination directory.
 
 If a `str` or `List[str]` is given as a migrator it will be treated as `command` with
 all other items not present.