utils/readme.txt: fix 'typos' typo

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 37574ab12a46602c31c103a82b8ef6a58968dfc7)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

utils/readme.txt

@@ -14,7 +14,7 @@ brmake
 check-package
     a script that checks the coding style across the buildroot tree. It
     checks package's Config.in and .mk files, runs shellcheck for all shell
-    scripts, flake8 for python files, checks for typoes, etc.
+    scripts, flake8 for python files, checks for typos, etc.
     It checks the .checkpackageignore file if errors should be ignored and
     errors if there's a file listed that doesn't produce an error.