doc: typo 'it it' in doc/develop/package/index.rst

%s/it it/it/

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/develop/package/index.rst b/doc/develop/package/index.rst
index 9374be2..4f44831 100644
--- a/doc/develop/package/index.rst
+++ b/doc/develop/package/index.rst
@@ -4,7 +4,7 @@
 ==============
 
 U-Boot uses Flat Image Tree (FIT) as a standard file format for packaging
-images that it it reads and boots. Documentation about FIT is available at
+images that it reads and boots. Documentation about FIT is available at
 doc/uImage.FIT
 
 U-Boot also provides binman for cases not covered by FIT. Examples include