Fixed spelling in docs/ref/django-admin.txt.

docs/ref/django-admin.txt

@@ -964,7 +964,7 @@ If the :doc:`staticfiles</ref/contrib/staticfiles>` contrib app is enabled
 (default in new projects) the :djadmin:`runserver` command will be overridden
 with its own :ref:`runserver<staticfiles-runserver>` command.
 
-If :djadmin:`migrate` was not previousy executed, the table that stores the
+If :djadmin:`migrate` was not previously executed, the table that stores the
 history of migrations is created at first run of ``runserver``.
 
 .. django-admin-option:: --noreload

docs/spelling_wordlist

@@ -69,6 +69,7 @@ Bronn
 bugfix
 bugfixes
 bugfixing
+buildbot
 builtin
 builtins
 Byteorder