[ostree] README.md: fix typo

[Giuseppe Scrivano <gscrivano src gnome org>]

commit 42edb6f91bd9b72ca41a8c58ed0d949495474731
Author: Giuseppe Scrivano <gscrivan redhat com>
Date:   Tue Apr 21 23:04:28 2015 +0200

    README.md: fix typo
    
    Signed-off-by: Giuseppe Scrivano <gscrivan redhat com>

 README.md |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/README.md b/README.md
index 41017b6..d4b4c42 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 OSTree is a tool for managing bootable, immutable, versioned
-filesystem trees. While it takes over some of the roles of tradtional
+filesystem trees. While it takes over some of the roles of traditional
 "package managers" like dpkg and rpm, it is not a package system; nor
 is it a tool for managing full disk images. Instead, it sits between
 those levels, offering a blend of the advantages (and disadvantages)