dev/test/ref-manual: Fix typos

Fix some typos.
s/necesary/necessary/
s/overriden/overridden/

(From yocto-docs rev: f4ce6ae80b1d96f9b8bead013642aeda0c776182)

Signed-off-by: Naoki Hayama <naoki.hayama@lineo.co.jp>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/test-manual/test-manual-understand-autobuilder.rst b/documentation/test-manual/test-manual-understand-autobuilder.rst
index de267776ca..2444333761 100644
--- a/documentation/test-manual/test-manual-understand-autobuilder.rst
+++ b/documentation/test-manual/test-manual-understand-autobuilder.rst
@@ -164,7 +164,7 @@ Cloning repositories from scratch each time they are required was slow
 on the Autobuilder. We therefore have a stash of commonly used
 repositories pre-cloned on the Workers. Data is fetched from these
 during clones first, then "topped up" with later revisions from any
-upstream when necesary. The cache is maintained by the Autobuilder
+upstream when necessary. The cache is maintained by the Autobuilder
 Worker Janitor. See :ref:`test-manual/test-manual-understand-autobuilder:Autobuilder Worker Janitor`.
 
 .. _test-autobuilder-worker-janitor: