docs: keep codespell happy (re-used → reused)

See codespell-project/codespell#3445

Author: jcristau

docs/howto/docker.rst

@@ -198,7 +198,7 @@ with the following contents:
 And that's it! The :mod:`~taskgraph.transforms.docker_image` transforms will
 process the ``Dockerfile`` and handle the special syntax. Whereas the
 :mod:`~taskgraph.transforms.cached_tasks` transforms will ensure the image is
-only generated once and then re-used by all subsequent pushes until the image
+only generated once and then reused by all subsequent pushes until the image
 is modified.
 
 Layering images on top of each other

docs/tutorials/creating-a-task-graph.rst

@@ -62,7 +62,7 @@ Create the ``config.yml`` file to look like:
 Here's an explanation of the required top-level keys:
 
 * ``trust-domain`` - :term:`Trust domains <Trust Domain>` help prevent
-  permissions and worker pools from one project from being re-used in another. The
+  permissions and worker pools from one project from being reused in another. The
   value you should use here will be configured by your Taskcluster administrator.
   But we'll use ``myrepo`` for the purposes of this tutorial.
 * ``task-priority`` - The priority of tasks for this repo.