[Buildroot] [git commit branch/2021.08.x] docs/manual/contribute.txt: fix typo

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=567d261721eed843f72f87f44e18295623b9f36a
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2021.08.x

Signed-off-by: Raphaël Mélotte <raphael.melotte at mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
(cherry picked from commit 226d5b3b95c1c54449c31358c888640281d45a33)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 docs/manual/contribute.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/manual/contribute.txt b/docs/manual/contribute.txt
index 14ecdbd66c..e58e75d96d 100644
--- a/docs/manual/contribute.txt
+++ b/docs/manual/contribute.txt
@@ -610,7 +610,7 @@ be the maintainer of that test case.
 Within the Buildroot repository, the testing framework is organized at the
 top level in +support/testing/+ by folders of +conf+, +infra+ and +tests+.
 All the test cases live under the +test+ folder and are organized in various
-folders representing the catagory of test.
+folders representing the category of test.
 
 Lets walk through an example.