doc: fix file extension for flattened image tree blob
Different sections in the document suggest flattened image tree blob
files have a file name extension of .itb. Fix the list of file extensions
to reflect that.
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
diff --git a/doc/uImage.FIT/source_file_format.txt b/doc/uImage.FIT/source_file_format.txt
index 3db068d..9c527c3 100644
--- a/doc/uImage.FIT/source_file_format.txt
+++ b/doc/uImage.FIT/source_file_format.txt
@@ -56,7 +56,7 @@
conforms to bindings defined in this document.
.its - image tree source
-.fit - flattened image tree blob
+.itb - flattened image tree blob
c) Image building procedure