KUnit: Docs: fix a wording typo

Fix a wording typo (keyboard glitch).

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: David Gow <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Shuah Khan <[e-mail]>
Cc: Shuah Khan <[e-mail]>
Cc: Brendan Higgins <[e-mail]>
Reviewed-by: David Gow <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

Documentation/dev-tools/kunit/faq.rst

···
    re-run kunit_tool.
 5. Try to run ``make ARCH=um defconfig`` before running ``kunit.py run``. This
    may help clean up any residual config items which could be causing problems.
-6. Finally, try running KUnit outside UML. KUnit and KUnit tests can run be
+6. Finally, try running KUnit outside UML. KUnit and KUnit tests can be
    built into any kernel, or can be built as a module and loaded at runtime.
    Doing so should allow you to determine if UML is causing the issue you're
    seeing. When tests are built-in, they will execute when the kernel boots, and